Gregory J Bellig, MD
Anesthesiology · Fremont
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 3
- 1 carrier
- Offices
- 3
- Since medical school
- 28 years
- Georgetown University School of Medicine, 1998
Offices
3 locations · Cep America - Anesthesia PC · Premier Anesthesia of California PC
Hospitals listed: John Muir Medical Center - Walnut Creek Campus. That is not proof they admit you there this week.
Plans that list them
3 plans · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Bellig’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| Imperial Courage Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Senior Value (HMO C-SNP) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
California Medical Board record
Licence A81822 · Current
Licensed to practise in California · since 2003 · expires 2029-01-31 · Georgetown University School of Medicine.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
School, training and certification
What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.
Specialty certification
- American Board of Anesthesiology - Anesthesiology
- American Board of Anesthesiology - Pediatric Anesthesiology
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.
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of John Muir Health, which runs 3 hospitalsPatients rate it 3 of 5 · 77% would definitely recommend itOverall rating: 2 of 5 starsWorse than the national rate — Abdominopelvic accidental puncture or laceration rate: 2.01 (1.17 to 2.85) · 2,206 cases, Jul 2022 – Jun 2024Worse than the national rate — Death rate among surgical inpatients with serious treatable complications: 222.42 (177.82 to 267.02) · 120 cases, Jul 2022 – Jun 2024Worse than the national rate — Pressure ulcer rate: 1.4 (0.91 to 1.9) · 9,764 cases, Jul 2022 – Jun 2024Worse than the national rate — SSI - Colon Surgery: 2.734, Oct 2024 – Sep 2025Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.536, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.341, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.455, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.245, Oct 2024 – Sep 2025
See every measure and the patient survey for John Muir Medical Center - Walnut Creek Campus
Behind the star rating — Deaths: 3 better, 2 the same, 2 worse of 7 measures. Safety: 2 better, 5 the same, 1 worse of 8 measures. Readmissions: 3 better, 5 the same, 2 worse of 10 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 2.01 (1.17 to 2.85) · 2,206 cases | Worse | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 222.42 (177.82 to 267.02) · 120 cases | Worse | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 1.4 (0.91 to 1.9) · 9,764 cases | Worse | Jul 2022 – Jun 2024 |
| SSI - Colon SurgeryInfections | 2.734 | Worse | Oct 2024 – Sep 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.536 | Better | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.341 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.455 | Better | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.245 | Better | Oct 2024 – Sep 2025 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.14 (0.87 to 1.4) | No different | Jul 2022 – Jun 2024 |
| Death rate for COPD patientsComplications and deaths | 6.4 · 131 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 10 · 148 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 9.8 · 695 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 12.5 · 827 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 14.1 · 509 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.4 · 4,483 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.35 (0.18 to 0.53) · 11,630 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.22 (0.05 to 0.39) · 11,793 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.33 (1.69 to 4.96) · 3,268 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.37 (0 to 2.94) · 1,631 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.76 (1.43 to 4.09) · 3,066 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 6.12 (0.22 to 12.02) · 1,580 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 4.43 (1.21 to 7.64) · 1,594 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.82 (0.4 to 3.24) · 685 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.9 · 615 cases | None | Apr 2023 – Mar 2025 |
| SSI - Abdominal HysterectomyInfections | 1.88 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.7 · 93 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 19.9 · 729 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | -30.1 · 91 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -13 · 736 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 34.8 · 842 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.7 · 818 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.3 (3.3 to 8.4) · 28 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 10.8 (7.2 to 15.5) · 28 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 4.9 · 584 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.4 · 139 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.2 (9.9 to 17.9) · 222 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1.1 (0.8 to 1.5) · 321 cases | No different | Jan 2024 – Dec 2024 |
What patients said (758 patients answered, 24% of those asked)
| Cleanliness | 3 |
| Nurse communication | 3 |
| Doctor communication | 3 |
| Communication about medicines | 2 |
| Discharge information | 4 |
| Overall hospital rating | 3 |
| Quietness | 3 |
| Recommend hospital | 4 |
| Room was "always" clean | 65% |
| Nurses "always" communicated well | 75% |
| Doctors "always" communicated well | 76% |
| Staff "always" explained | 55% |
| Yes, staff "did" give patients this information | 87% |
| Yes, staff "did" give patients information about help after discharge | 87% |
| Doctors "always" explained things so they could understand | 70% |
| Doctors "always" listened carefully | 75% |
| Doctors "always" treated them with courtesy and respect | 82% |
| Patients who gave a rating of "9" or "10" (high) | 69% |
| Staff "always" explained new medications | 68% |
| Nurses "always" explained things so they could understand | 71% |
| Nurses "always" listened carefully | 72% |
| Nurses "always" treated them with courtesy and respect | 83% |
| "Always" quiet at night | 53% |
| "YES", patients would definitely recommend the hospital | 77% |
| Staff "always" explained possible side effects | 42% |
| Yes, staff "did" give patients information about possible symptoms | 87% |
Original Medicare doctor bills
$16,112
Medicare paid this office $16,112 for 77 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Procedures year by year
| Procedure | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|
| Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) | – | – | 16 | – | – |
| Insertion of artery tube for blood sampling or infusion through skin | – | 13 | – | – | – |
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
77 Original Medicare patients in 2024. Average age 76 · Women 52% · Also on Medicaid 23% · Health risk score 1.43. At or below the middle of the specialty; the typical anesthesiology clinician is at 1.54.
Conditions among them: High blood pressure 75% · Cancer 36% · Chronic kidney disease 35% · Coronary heart disease 32% · Diabetes 26% · Atrial fibrillation 23% · Depression 21% · Heart failure 19% · COPD 16% · Stroke 16%.
The office billed $198,966, Medicare allowed $20,256 and paid $16,112; for 87 services of 37 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
| 2024 | 77 | 87 | 76 | 1.43 | $198,966 | $16,112 |
| 2023 | 178 | 194 | 73 | 1.84 | $400,976 | $35,297 |
| 2022 | 285 | 350 | 74 | 1.39 | $791,300 | $55,938 |
| 2021 | 189 | 234 | 73 | 1.42 | $641,043 | $44,265 |
| 2020 | 23 | 28 | 71 | 1.64 | $66,170 | $4,921 |
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: 3 services
| Anesthesia for x-ray or radiation therapy | 16 | $3,284 | $205 |
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 19 | $2,630 | $138 |
| Anesthesia for other procedure on large bowel using an endoscope | 18 | $2,061 | $115 |
2022: 8 services
| Anesthesia for lens surgery | 65 | $7,820 | $120 |
| Anesthesia for procedure for total knee joint replacement | 16 | $4,657 | $291 |
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 26 | $3,798 | $136 |
| Anesthesia for other procedure on large bowel using an endoscope | 17 | $2,354 | $138 |
| Anesthesia for procedure on small and large bowel using an endoscope | 13 | $1,970 | $152 |
| Anesthesia for exam of colon using an endoscope | 12 | $1,402 | $117 |
| Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) | 16 | $892 | $56 |
| Ultrasonic guidance for needle placement | 19 | $523 | $28 |
2021: 2 services
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 33 | $4,539 | $138 |
| Insertion of artery tube for blood sampling or infusion through skin | 13 | $509 | $39 |
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 16 Part D prescriptions in 2019. 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
| 2019 | 16 | None | 0% (0) | 0% | $214 |
| 2018 | 53 | None | 0% (0) | None | $2,492 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
Money from drug and device companies
$49 in 2021
A payment is not proof that care is biased.
| Acacia Pharma | Barhemsys | $49 | 1 payment
|
See the published payment
| Acacia Pharma | Meals · 2021-08-09 | Barhemsys | $49 |
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 61.2 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1558354993
- Licence
- CA A81822, MI 4301113241, PA MD456369California A81822: Current · expires 2029-01-31
- Trained
- Georgetown University School of Medicine, 1998 · 28 years ago
- Group
- Cep America - Anesthesia PC · Premier Anesthesia of California PC
- Gender
- Male
More record details
- Sole proprietor
- No
- Medicaid ID
- CA GR0028370
- Taxonomy
- Federal specialty code 207L00000X (207L00000X)
- Mailing address
- 567 Sycamore Valley Rd W, Danville, CA, 94526
- NPI first listed
- 2005-08-30
- NPI last updated
- 2026-09-20
- NPI record certified
- 2026-09-20
This is when the NPI record was last certified, not a medical board exam.