Derek Glen Mcallister, DO

Offices

63 locations · Smi Imaging LLC · Simonmed Imaging Florida LLC · Health Diagnostics of California A Professional Corporation · Howard John Simon MD PC

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Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Mcallister’s office to ask if they take your plan before you enroll.

Original Medicare doctor bills

$400,780

Medicare paid this office $400,780 for 2,604 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

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Largest Original Medicare bills

Mri scan of lower spinal canal without contrast	904	$114,866	$123
Mri scan of brain before and after contrast	360	$81,914	$218
Mri scan of upper spinal canal without contrast	379	$44,849	$115
Mri scan of brain without contrast	323	$40,205	$120
Mri scan of middle spinal canal without contrast	175	$19,502	$107

See all 29 services

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Every Original Medicare service billed

Mri scan of lower spinal canal without contrast	904	$114,866	$123
Mri scan of brain before and after contrast	360	$81,914	$218
Mri scan of upper spinal canal without contrast	379	$44,849	$115
Mri scan of brain without contrast	323	$40,205	$120
Mri scan of middle spinal canal without contrast	175	$19,502	$107
Ct scan of lower spine without contrast	146	$12,450	$82
Mri scan of lower spinal canal before and after contrast	44	$8,994	$204
Mri scan of upper spinal canal before and after contrast	35	$7,457	$213
Mri scan of bone of eye socket, face, and/or neck before and after contrast	35	$7,137	$193
Ct scan of blood vessels of neck with contrast	36	$5,871	$155
Ct scan of upper spine without contrast	56	$5,082	$88
Mri scan of middle spinal canal before and after contrast	20	$5,008	$250
Ct scan head or brain without contrast	87	$4,845	$50
Ct scan of face without contrast	69	$4,830	$68
Injection, gadoterate meglumine, 0.1 ml	410	$4,140	$0
Ct scan of middle spine without contrast	39	$3,362	$80
Ct scan of blood vessels of head with contrast	19	$3,350	$168
Ct scan of soft tissue of neck with contrast	21	$2,755	$131
Ct scan of soft tissue of neck before and after contrast	13	$1,913	$147
Dxa bone density measurement of hip, pelvis, spine	51	$1,871	$37
Mri scan of blood vessels of head without contrast	18	$1,635	$91
Ct scan of head or brain before and after contrast	14	$1,407	$100
Ct scan of cranial cavity without contrast	13	$1,383	$106
3d radiographic procedure with computerized image postprocessing	21	$1,157	$55
Ct scan of soft tissue of neck without contrast	11	$1,046	$95
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	91	$973	$0
3d radiographic procedure	35	$646	$18
Insertion of needle into vein for collection of blood sample	14	$121	$9
Blood creatinine level	13	$65	$5

Procedures year by year

Procedures billed to Original Medicare by year
Procedure	2020	2021	2022	2023	2024
Fine needle aspiration biopsy using ultrasound guidance, first growth	–	–	34	36	–
Fine needle aspiration biopsy using ultrasound guidance, each additional growth	–	–	12	–	–

Times billed to Original Medicare each year. A blank year means fewer than 11 people had it, or none: Medicare does not publish smaller counts. Medicare Advantage patients are not included.

Who their Medicare patients are

2,604 Original Medicare patients in 2024. Average age 74 · Under 65 5% · 85 and older 8% · Women 59% · Also on Medicaid 9% · Health risk score 1.15. At or below the middle of the specialty; the typical diagnostic radiology clinician is at 1.7.

Conditions among them: High blood pressure 73% · Diabetes 28% · Coronary heart disease 28% · Chronic kidney disease 24% · Depression 24% · Cancer 15% · COPD 15% · Atrial fibrillation 15% · Heart failure 10% · Stroke 10% · Dementia 7%.

The office billed $4,181,943, Medicare allowed $526,477 and paid $400,780; for 56,158 services of 63 kinds; $5,123 of it was for drugs given in the office and $395,656 for care.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

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Original Medicare by year

2024	2,604	56,158	74	1.15	$4,181,943	$400,780
2023	3,467	66,375	73	1.20	$3,257,453	$479,651
2022	2,284	53,821	72	1.19	$2,535,103	$380,333
2021	1,601	25,828	73	1.22	$1,501,788	$230,269
2020	1,492	15,231	74	1.43	$801,727	$153,146

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 36 services

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Original Medicare services billed in 2023

Mri scan of lower spinal canal without contrast	723	$113,498	$148
Mri scan of brain before and after contrast	230	$63,406	$251
Mri scan of brain without contrast	324	$53,435	$154
Mri scan of upper spinal canal without contrast	327	$44,832	$127
Dxa bone density measurement of hip, pelvis, spine	1,133	$41,227	$36
Mri scan of middle spinal canal without contrast	118	$15,496	$121
Ultrasound scan of head and neck soft tissue	183	$14,303	$77
Mri scan of lower spinal canal before and after contrast	50	$12,968	$249
Ct scan head or brain without contrast	103	$8,275	$76
Ct scan of lower spine without contrast	80	$7,059	$82
Mri scan of upper spinal canal before and after contrast	28	$6,541	$218
Mri scan of blood vessels of head without contrast	38	$6,432	$153
Injection, gadoterate meglumine, 0.1 ml	319	$6,121	$0
Mri scan of bone of eye socket, face, and/or neck before and after contrast	18	$5,609	$312
Mri scan of blood vessels of head before and after contrast	20	$5,400	$270
Ct scan of soft tissue of neck with contrast	79	$5,322	$63
Dxa bone density measurement of forearm, finger, hand, or foot	176	$5,258	$30
Mri scan of middle spinal canal before and after contrast	20	$5,210	$227
Ct scan of upper spine without contrast	49	$5,024	$99
Mri scan of blood vessels of neck without contrast	26	$4,891	$175
Mri scan of blood vessels of neck before and after contrast	14	$4,522	$301
Ct scan of blood vessels of neck with contrast	24	$4,286	$165
Ct scan of blood vessels of head with contrast	17	$3,361	$187
Double contrast x-ray of esophagus	36	$3,114	$87
Ct scan of face without contrast	29	$3,043	$95
Fine needle aspiration biopsy using ultrasound guidance, first growth	35	$2,948	$82
Ct scan of head or brain before and after contrast	24	$2,120	$85
Ct scan of soft tissue of neck without contrast	26	$2,025	$72
Ct scan of cranial cavity without contrast	15	$1,967	$116
Ct scan of soft tissue of neck before and after contrast	11	$1,892	$158
Dxa bone density measurement of hip, pelvis, spine including spine fracture assessment	32	$1,596	$50
Double contrast x-ray of upper digestive tract	15	$1,529	$102
Ct scan of middle spine without contrast	15	$1,415	$88
Ct scan of heart with evaluation of blood vessel calcium	17	$1,302	$77
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	73	$710	$0
Low osmolar contrast material, 200-299 mg/ml iodine concentration, per ml	12	$47	$0

2022: 27 services

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Original Medicare services billed in 2022

Mri scan of lower spinal canal without contrast	643	$102,764	$159
Mri scan of brain before and after contrast	179	$49,117	$268
Mri scan of brain without contrast	268	$44,759	$166
Mri scan of upper spinal canal without contrast	253	$34,985	$138
Dxa bone density measurement of hip, pelvis, spine	423	$15,099	$36
Mri scan of lower spinal canal before and after contrast	50	$12,557	$251
Ultrasound scan of head and neck soft tissue	155	$12,254	$78
Mri scan of middle spinal canal without contrast	79	$9,702	$121
Ct scan of lower spine without contrast	91	$9,186	$101
Ct scan head or brain without contrast	111	$8,954	$80
Mri scan of upper spinal canal before and after contrast	31	$7,905	$255
Mri scan of middle spinal canal before and after contrast	20	$5,667	$283
Mri scan of blood vessels of head without contrast	32	$5,361	$168
Injection, gadoterate meglumine, 0.1 ml	269	$5,053	$0
Ct scan of blood vessels of head with contrast	20	$4,110	$206
Mri scan of blood vessels of neck without contrast	20	$3,809	$190
Ct scan of upper spine without contrast	37	$3,574	$97
Mri scan of bone of eye socket, face, and/or neck before and after contrast	11	$3,390	$308
Fine needle aspiration biopsy using ultrasound guidance, first growth	33	$3,379	$99
Ct scan of blood vessels of neck with contrast	19	$3,317	$175
Ct scan of face without contrast	26	$2,858	$102
Double contrast x-ray of esophagus	36	$2,594	$72
Ct scan of middle spine without contrast	19	$1,761	$93
Ct scan of soft tissue of neck with contrast	12	$1,632	$136
Dxa bone density measurement of forearm, finger, hand, or foot	53	$1,590	$30
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	68	$554	$0
Fine needle aspiration biopsy using ultrasound guidance, each additional growth	12	$473	$39

2021: 30 services

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Original Medicare services billed in 2021

Mri scan of lower spinal canal without contrast	312	$50,773	$162
Mri scan of brain without contrast	150	$23,615	$155
Mri scan of brain before and after contrast	87	$23,601	$262
Mri scan of upper spinal canal without contrast	143	$21,216	$147
Ct scan head or brain without contrast	103	$7,828	$76
Mri scan of middle spinal canal without contrast	60	$7,763	$129
Dxa bone density measurement of hip, pelvis, spine	173	$6,420	$37
Ct scan of lower spine without contrast	55	$5,708	$104
Ultrasound scan of head and neck soft tissue	65	$5,517	$85
Mri scan of blood vessels of head without contrast	31	$5,205	$168
Mri scan of lower spinal canal before and after contrast	17	$4,682	$275
Ct scan of blood vessels of neck with contrast	29	$4,525	$156
Ct scan of blood vessels of head with contrast	20	$3,946	$197
Ct scan of face without contrast	30	$3,186	$103
Ct scan of upper spine without contrast	28	$2,957	$106
Mri scan of blood vessels of neck without contrast	14	$2,561	$183
Ultrasound study of one arm or leg veins with compression and maneuvers	28	$2,364	$82
X-ray of chest, 2 views	98	$2,168	$22
Injection, gadoterate meglumine, 0.1 ml	117	$1,964	$0
Double contrast x-ray of esophagus	20	$1,779	$89
Ct scan of soft tissue of neck with contrast	12	$1,702	$142
Ct scan of head or brain before and after contrast	11	$1,498	$136
Ct scan of chest without contrast	14	$1,075	$77
Complete ultrasound scan of abdomen	12	$836	$70
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	79	$732	$0
X-ray of lower and sacral spine, 2-3 views	24	$716	$30
X-ray of lower and sacral spine, minimum of 4 views	16	$528	$33
X-ray of chest, 1 view	62	$445	$7
X-ray of upper spine, 2-3 views	16	$431	$27
X-ray of shoulder, minimum of 2 views	13	$374	$23

2020: 44 services

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Original Medicare services billed in 2020

Mri scan of brain before and after contrast	67	$18,837	$281
Mri scan of lower spinal canal without contrast	72	$11,760	$161
Mri scan of brain without contrast	66	$10,792	$164
Ct scan head or brain without contrast	62	$5,335	$85
Ct scan of chest without contrast	44	$4,671	$106
Mri scan of blood vessels of head without contrast	24	$4,587	$183
Ct scan of abdomen and pelvis with contrast	28	$4,545	$162
Ct scan head or brain without contrast	105	$3,799	$35
Mri scan of upper spinal canal without contrast	24	$3,567	$149
Ct scan of soft tissue of neck with contrast	32	$3,331	$104
X-ray of chest, 2 views	122	$3,078	$25
Nuclear medicine study of bone and/or joint whole body	12	$2,878	$240
Ct scan of blood vessels of head with contrast	14	$2,806	$200
Ct scan of blood vessels of neck with contrast	16	$2,663	$166
Ct scan of abdomen and pelvis without contrast	18	$2,578	$143
Ultrasound of both sides of head and neck blood flow	14	$2,200	$157
Ct scan of chest with contrast	25	$2,143	$86
Complete ultrasound scan of abdomen	23	$2,070	$90
Injection, gadobutrol, 0.1 ml	90	$2,042	$0
Ultrasound scan of head and neck soft tissue	23	$2,033	$88
Ct scan of face without contrast	19	$2,003	$105
Ct scan of lower spine without contrast	16	$1,791	$112
Mri scan of middle spinal canal without contrast	12	$1,645	$137
Dxa bone density measurement of hip, pelvis, spine	41	$1,587	$39
Ultrasound study of one arm or leg veins with compression and maneuvers	14	$1,341	$96
X-ray of chest, 1 view	159	$1,284	$7
X-ray of lower and sacral spine, minimum of 4 views	30	$1,139	$38
Ct scan of upper spine without contrast	24	$1,074	$43
Ct scan of blood vessels of head with contrast	15	$1,066	$71
Mri scan of brain without contrast	17	$1,007	$59
Ct scan of blood vessels of neck with contrast	14	$951	$68
Complete ultrasound scan behind abdominal cavity	11	$912	$83
X-ray of abdomen, 1 view	37	$847	$23
Ct scan of blood vessels of chest with contrast	11	$803	$73
Limited ultrasound scan behind abdominal cavity	15	$699	$47
X-ray of lower and sacral spine, 2-3 views	19	$538	$28
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	78	$537	$0
X-ray of hip, 2-3 views	14	$473	$34
X-ray of hand, minimum of 3 views	13	$457	$24
X-ray of upper spine, 2-3 views	17	$418	$25
X-ray of shoulder, minimum of 2 views	16	$389	$23
X-ray of chest, 2 views	26	$229	$9
Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries	12	$142	$12
X-ray of abdomen, 1 view	18	$140	$7

Medicaid work

$198,672 in 2024

Medicaid paid $198,672 for 1,810 billed services this clinician did in 2024, up to 65 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

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Largest Medicaid services in 2024

Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; without contrast material	567	$69,591
MRI BRAIN BRAIN STEM W/O W/CONTRAST MATERIAL	278	$54,828
Magnetic resonance (eg, proton) imaging, spinal canal and contents, cervical; without contrast material	317	$37,777
MRI BRAIN BRAIN STEM W/O CONTRAST MATERIAL	201	$25,562
Magnetic resonance (eg, proton) imaging, spinal canal and contents, thoracic; without contrast material	40	$4,804
Injection, gadoterate meglumine, 0.1 ml	344	$2,876
Ultrasound, soft tissues of head and neck (eg, thyroid, parathyroid, parotid), real time with image documentation	14	$1,353
CT MAXILLOFACIAL W/O CONTRAST MATERIAL	13	$1,228
DXA BONE DENSITY STUDY 1/> SITES AXIAL SKEL	22	$552
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	14	$101

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Medicaid work by year

2024	1,810	10	65	$198,672
2023	3,531	9	62	$343,597
2022	3,108	9	53	$266,949
2021	2,115	15	61	$181,886
2020	439	8	83	$25,764

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; without contrast material	1,100	$141,866
MRI BRAIN BRAIN STEM W/O CONTRAST MATERIAL	555	$60,787
Magnetic resonance (eg, proton) imaging, spinal canal and contents, cervical; without contrast material	544	$60,389
MRI BRAIN BRAIN STEM W/O W/CONTRAST MATERIAL	289	$45,497
Ultrasound, soft tissues of head and neck (eg, thyroid, parathyroid, parotid), real time with image documentation	275	$21,187
DXA BONE DENSITY STUDY 1/> SITES AXIAL SKEL	397	$8,380
Injection, gadoterate meglumine, 0.1 ml	313	$2,597
Computed tomography, head or brain; without contrast material	27	$1,704
CT MAXILLOFACIAL W/O CONTRAST MATERIAL	31	$1,190

2022

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Largest Medicaid services in 2022

Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; without contrast material	1,130	$125,370
MRI BRAIN BRAIN STEM W/O CONTRAST MATERIAL	533	$46,942
Magnetic resonance (eg, proton) imaging, spinal canal and contents, cervical; without contrast material	416	$39,895
MRI BRAIN BRAIN STEM W/O W/CONTRAST MATERIAL	201	$25,648
Ultrasound, soft tissues of head and neck (eg, thyroid, parathyroid, parotid), real time with image documentation	291	$21,835
Injection, gadoterate meglumine, 0.1 ml	319	$2,535
DXA BONE DENSITY STUDY 1/> SITES AXIAL SKEL	124	$2,343
Computed tomography, head or brain; without contrast material	79	$2,193
Magnetic resonance (eg, proton) imaging, spinal canal and contents, thoracic; without contrast material	15	$188

2021

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Largest Medicaid services in 2021

Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; without contrast material	577	$60,076
MRI BRAIN BRAIN STEM W/O CONTRAST MATERIAL	368	$48,136
Magnetic resonance (eg, proton) imaging, spinal canal and contents, cervical; without contrast material	242	$25,272
MRI BRAIN BRAIN STEM W/O W/CONTRAST MATERIAL	73	$16,799
Ultrasound, soft tissues of head and neck (eg, thyroid, parathyroid, parotid), real time with image documentation	200	$15,620
Computed tomography, head or brain; without contrast material	110	$5,443
Radiologic examination, chest; 2 views	183	$3,736
Ultrasound, abdominal, real time with image documentation; complete	17	$1,761
DXA BONE DENSITY STUDY 1/> SITES AXIAL SKEL	86	$1,615
Injection, gadoterate meglumine, 0.1 ml	153	$1,575
ECHO EXAM OF ABDOMEN	12	$641
Radiologic examination, spine, lumbosacral; minimum of 4 views	12	$477

2020

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Largest Medicaid services in 2020

MRI BRAIN BRAIN STEM W/O W/CONTRAST MATERIAL	50	$10,778
MRI BRAIN BRAIN STEM W/O CONTRAST MATERIAL	46	$9,631
Computed tomography, head or brain; without contrast material	72	$2,066
Injection, gadobutrol, 0.1 ml	67	$1,478
Radiologic examination, chest; single view	165	$991
CT CERVICAL SPINE W/O CONTRAST MATERIAL	13	$445
Radiologic examination, chest; 2 views	14	$330
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml	12	$46

Drugs they prescribed that Part D paid

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 0% of their 36 Part D prescriptions in 2014. Too few prescriptions to judge: with under about 50 a year, a handful of patients can swing this share.

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

Year by year

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Part D prescribing by year

2014	36	19	0% (0)	None	$2,939
2013	21	None	0% (0)	None	$993

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

Money from drug and device companies

$21 in 2020

A payment is not proof that care is biased.

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Payments by company

Medtronic USA	Kyphon Balloon Kyphoplasty	$21	1 payment Meals for Kyphon Balloon Kyphoplasty · 2020-01-25 · $21

See the published payment

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Every published payment

Medtronic USA	Meals · 2020-01-25	Kyphon Balloon Kyphoplasty	$21

Professional record

NPI: 1861832230
Licence: CA 20A16474, MI 5101020333
Trained: Rocky Vista University College of Osteopathic Med, 2013 · 13 years ago
Group: Smi Imaging LLC · Simonmed Imaging Florida LLC · Health Diagnostics of California A Professional Corporation · Howard John Simon MD PC
Gender: Male

More record details

Sole proprietor: Yes
Taxonomy: Federal specialty code 2085D0003X (2085D0003X); Diagnostic radiology (2085R0202X)
Mailing address: 300 Pasteur Dr, Stanford, CA, 94305
NPI first listed: 2013-07-01
NPI last updated: 2022-08-05
NPI record certified: 2022-08-05

This is when the NPI record was last certified, not a medical board exam.

Extra NPI addresses: 300 Pasteur Dr, Stanford, CA, 94305