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Ahmed Mohyeldin, MD

Neurosurgery · Orange

NPI 1912213687

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Office
1

Offices

1 location · Regents of the University of California · 27 clinicians in this group

Looking this up.

Hospitals listed: Uci Health-Orange. That is not proof they admit you there this week.

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. Mohyeldin’s office at (714) 456-7004 to ask if they take your plan before you enroll.

California Medical Board record

Licence A159685 · Current

Licensed to practise in California · since 2018 · expires 2026-11-30 · George Washington University School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Hospitals they work in

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

  • Uci Health-OrangeOrange, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of University of California Health, which runs 12 hospitalsHome of Chao Family Comprehensive Cancer Center, a National Cancer Institute designated comprehensive cancer centrePatients rate it 2 of 5 · 67% would definitely recommend it
    Overall rating: 4 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.44 (3.82 to 7.06) · 2,934 cases, Jul 2022 – Jun 2024Better than the national rate — Death rate among surgical inpatients with serious treatable complications: 82.98 (46.2 to 119.76) · 170 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.422, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.56, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.547, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.356, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.449, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.8 (0.6 to 1) · 1,287 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for Uci Health-Orange

Behind the star rating — Deaths: 3 better, 5 the same, 0 worse of 8 measures. Safety: 4 better, 4 the same, 0 worse of 8 measures. Readmissions: 2 better, 7 the same, 2 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at Uci Health-Orange
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths5.44 (3.82 to 7.06) · 2,934 casesWorseJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths82.98 (46.2 to 119.76) · 170 casesBetterJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.422BetterOct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.56BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.547BetterOct 2024 – Sep 2025
MRSA BacteremiaInfections0.356BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.449BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.8 (0.6 to 1) · 1,287 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.06 (0.25 to 1.87) · 2,297 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.9 (0.67 to 1.13)No differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths3.3 · 60 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths7.2 · 59 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths12.2 · 104 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths10.3 · 331 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths15.1 · 416 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths10.4 · 330 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths3 · 4,269 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.14 (0 to 0.33) · 8,263 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.19 (0.01 to 0.37) · 8,703 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.95 (0.57 to 3.32) · 1,647 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.52 (1.33 to 3.71) · 2,756 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths7.15 (2.82 to 11.48) · 1,643 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths4.78 (2.24 to 7.33) · 1,680 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.98 (0.61 to 3.36) · 871 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.28 (0 to 0.77) · 7,232 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.5 · 170 casesNoneApr 2023 – Mar 2025
SSI - Abdominal HysterectomyInfections0.546No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits14.6 · 165 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.8 · 556 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits75.5 · 113 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits0 · 391 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits-4.4 · 436 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.8 · 556 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.2 (4.1 to 6.6) · 846 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits11.8 (10 to 14) · 846 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.8 · 200 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits12.9 · 64 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits21 · 110 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits10.8 (8.6 to 13.8) · 2,457 casesNo differentJan 2022 – Dec 2024

What patients said (575 patients answered, 16% of those asked)

Patient survey stars by topic at Uci Health-Orange
Cleanliness3
Nurse communication2
Doctor communication2
Communication about medicines2
Discharge information3
Overall hospital rating3
Quietness1
Recommend hospital3
Share of patients giving the best answer at Uci Health-Orange
Room was "always" clean62%
Nurses "always" communicated well72%
Doctors "always" communicated well74%
Staff "always" explained57%
Yes, staff "did" give patients this information86%
Yes, staff "did" give patients information about help after discharge86%
Doctors "always" explained things so they could understand69%
Doctors "always" listened carefully72%
Doctors "always" treated them with courtesy and respect81%
Patients who gave a rating of "9" or "10" (high)65%
Staff "always" explained new medications69%
Nurses "always" explained things so they could understand67%
Nurses "always" listened carefully69%
Nurses "always" treated them with courtesy and respect80%
"Always" quiet at night40%
"YES", patients would definitely recommend the hospital67%
Staff "always" explained possible side effects45%
Yes, staff "did" give patients information about possible symptoms87%

Original Medicare doctor bills

$86,056

Medicare paid this office $86,056 for 117 people.

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

Largest Original Medicare bills
Computer-assisted radiosurgery of complex growth of brain, first growth16$20,269$1,126
Critical care, first 30-74 minutes32$8,162$163
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes20$3,757$94
Computer-assisted radiosurgery application of headframe23$3,126$120
Return visit (30+ min)24$2,573$78
See all 7 services
Every Original Medicare service billed
Computer-assisted radiosurgery of complex growth of brain, first growth16$20,269$1,126
Critical care, first 30-74 minutes32$8,162$163
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes20$3,757$94
Computer-assisted radiosurgery application of headframe23$3,126$120
Return visit (30+ min)24$2,573$78
Initial hospital care with moderate level of medical decision making at least 75 minutes14$1,991$124
New patient visit (60+ min)11$1,648$150

Who their Medicare patients are

117 Original Medicare patients in 2024. Average age 76 · Under 65 11% · 85 and older 23% · Women 53% · Also on Medicaid 52% · Health risk score 2.47. Sicker patients than 9 in 10 peers; the typical neurosurgery clinician is at 1.46.

Conditions among them: High blood pressure 75% · Stroke 53% · Diabetes 40% · Cancer 38% · Heart failure 35% · Chronic kidney disease 33% · Coronary heart disease 31% · Depression 31% · Dementia 28% · Atrial fibrillation 26% · COPD 21%.

The office billed $488,929, Medicare allowed $109,466 and paid $86,056; for 318 services of 34 kinds.

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

Original Medicare by year
2024117318762.47$488,929$86,056
2023115329762.35$436,820$78,201
202257110742.10$149,701$27,185
20213153761.43$123,183$8,945
20202943731.31$132,173$9,994
20193136771.82$37,253$8,222

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: 8 services

Original Medicare services billed in 2023
Computer-assisted radiosurgery of complex growth of brain, first growth13$17,139$1,143
Critical care, first 30-74 minutes28$9,302$176
Long return visit (40+ min)32$5,823$116
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes23$4,170$97
Initial hospital care with moderate level of medical decision making at least 75 minutes24$3,487$145
Computer-assisted radiosurgery application of headframe17$2,701$123
New patient visit (60+ min)17$2,426$143
Return visit (30+ min)12$980$82

2022: 2 services

Original Medicare services billed in 2022
Long return visit (40+ min)16$2,268$126
New patient visit (60+ min)15$2,226$148

Medicaid work

$8,944 in 2023

Medicaid paid $8,944 for 57 billed services this clinician did in 2023, up to 15 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.

Largest Medicaid services in 2023
Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes57$8,944
Medicaid work by year
202357115$8,944

Drugs they prescribed that Part D paid

$866

Pharmacies billed $866 in 2024.

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

36 generic and 0 brand-name prescriptions · $866 in drug cost.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Largest Part D drug costs
Gabapentin15$80$5

Year by year

Part D prescribing by year
20243611None0%$866
202328None0% (0)None$1,204
202219None0% (0)0%$461
201312NoneNoneNone$248

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

Money from drug and device companies

$141 in 2025

Industry payments by year
202511None$141
202411None$118
2023211None$1,359
202234$75$328
202112None$112

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
MedtronicStealthstation S8 Platform$141
1 payment
  • Meals for Stealthstation S8 Platform · 2025-02-17 · $141
See the published payment
Every published payment
MedtronicMeals · 2025-02-17Stealthstation S8 Platform$141
See earlier years (2024, 2023, 2022, 2021)

2024: $118

Payments by company in 2024
Irras USANone$118
1 payment
  • Meals · 2024-09-30 · $118

2023: $1,359

Payments by company in 2023
StrykerCore$1,338
10 payments
  • Travel for Core · 2023-10-30 · $167
  • Travel for Core · 2023-10-30 · $133
  • Meals for Core · 2023-10-28 · $34
  • Meals for Core · 2023-10-27 · $9
  • Meals for Core · 2023-10-27 · $40
  • Travel for Core · 2023-10-26 · $149
  • Travel for Core · 2023-10-26 · $16
  • Meals for Core · 2023-10-26 · $140
  • Meals for N/A · 2023-10-09 · $16
  • Travel for Core · 2023-10-04 · $632
KLS-Martin L.P.None$22
1 payment
  • Meals · 2023-05-18 · $22

2022: $328

Payments by company in 2022
DePuy Synthes SalesAnspach Helix$226
2 payments
  • Meals for Anspach Helix · 2022-10-09 · $150
  • Meals for Anspach Helix · 2022-02-19 · $76
Irras USANone$75
1 payment
  • Consulting · 2022-10-10 · $75
Sanofi PasteurFluzone Quadrivalent Northern Hemisphere$27
1 payment
  • Meals for Fluzone Quadrivalent Northern Hemisphere · 2022-09-23 · $27

2021: $112

Payments by company in 2021
StrykerCranialmap$112
2 payments
  • Meals for Universal Neuro 3 · 2021-10-08 · $45
  • Meals for Cranialmap · 2021-09-20 · $67

Professional record

NPI
1912213687
Licence
CA A159685, OH 57020192California A159685: Current · expires 2026-11-30
Trained
George Washington University School of Medicine, 2011
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 207T00000X (207T00000X)
Mailing address
200 S Manchester Ave Ste 300, Orange, CA, 92868
NPI first listed
2010-08-19
NPI last updated
2023-03-14
NPI record certified
2023-03-14

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

Extra NPI addresses: 410 West 10th Avenue, Columbus, OH, 43215 · 1165 Montgomery Dr, Santa Rosa, CA, 95405 · 300 Pasteur Dr, Stanford, CA, 94305

This office lists an electronic records connection.