NPI registry status
Active
2026 NPPES data Transplant Surgery Physician NPI 1396799516 MD
Verify on CMS → Nancy Ascher, MD
Transplant Surgery Physician in San Francisco, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,025 in Transplant Surgery Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
180
Medicare Part D claims · 24 beneficiaries · Transplant Surgery Physician avg: 275
MIPS score
75/100
CMS neutral threshold · no category scores published
What the federal data shows
Nancy Ascher, MD carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 180 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 180
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥35th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1396799516 · Transplant Surgery Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-NEUTRAL · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1396799516
- ENUM-LEGACY 2006
- TAX-NARROW 1,025
- MIPS-NEUTRAL 75/100
- RX-LIGHT 180
- BOOK-THIN 100 in California
- PHOTO-ENUM Ernest Beecherl · 2006
Nancy Ascher, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
180 ≥ 35th percentile 35% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Nancy Ascher, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Nancy Ascher, MD?
CMS neutral score, not measuredPrimary specialty
Transplant Surgery Physician
Medicare Part D claims
180 35% vs specialty avg
MIPS final score
75/100
Specialty distribution in California
How Transplant Surgery Physician compares to other specialties among California providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1396799516 |
|---|---|
| Specialty | Transplant Surgery Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/20/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Group practice
Hospital and facility affiliations
Facilities where Nancy Ascher, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Ucsf Dept OF Surgery
San Francisco, CA
Ucsf Medical Group Business Services
San Francisco, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Nancy Ascher, MD. To verify Nancy Ascher, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
180
Total Claims
$24K
Total Drug Cost
24
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 265
- Total Day Supply
- 7,780
- Generic Drug Cost
- $9K
- Antibiotic Claims
- 26
Patient Demographics
- Average Patient Age
- 65.3 years
- Avg HCC Risk Score
- 2.98
- Gender Split
- 50% female / 50% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nancy Ascher, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sulfamethoxazole-T…
Sulfamethoxazole-Trimethoprim
24 claims
- Omeprazole
Omeprazole
23 claims
- Pantoprazole Sodium
Pantoprazole Sodium
18 claims
- Prednisone
Prednisone
15 claims
- Valganciclovir Hcl
Valganciclovir Hcl
15 claims
| Drug | Claims |
|---|---|
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 24 |
| Omeprazole | 23 |
| Pantoprazole Sodium | 18 |
| Prednisone | 15 |
| Valganciclovir Hcl | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Transplant Surgery Physician Overview
How Nancy Ascher, MD fits within the Transplant Surgery Physician landscape nationally.
1,025
Transplant Surgery Physician Providers in US
48
States with Transplant Surgery Physician
275
Avg Claims per Provider
Nancy Ascher, MD's 180 claims are below the specialty average of 275.
Nationwide Transplant Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Ascher, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Transplant Surgery Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Ascher.
One of 100 Transplant Surgery Physician providers enrolled in California, 5 are shown here.
Dr. Ali Abidali
DO
Glendora, CA
Dr. Ahmad Abou Abbass
M.D
Mission Viejo, CA
Dr. Dylan Adamson
M.D.
La Jolla, CA
Dr. Aaron Ahearn
MD-PHD
Los Angeles, CA
Dr. Aiman Alassar
MD, PHD
Palo Alto, CA
Compare Transplant Surgery Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Nancy Ascher, MD's specialty? ▼
Nancy Ascher, MD specializes in Transplant Surgery Physician and practices in San Francisco, California. Credentials: MD.
How much does Nancy Ascher, MD prescribe under Medicare Part D? ▼
In 2023, Nancy Ascher, MD wrote 180 Medicare Part D claims totaling $24K in drug costs for 24 beneficiaries.
What is Nancy Ascher, MD's Medicare quality score? ▼
Nancy Ascher, MD has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Nancy Ascher, MD located? ▼
Nancy Ascher, MD is located at 400 PARNASSUS AVE, San Francisco, CA, 94143. Phone: (415) 353-1888.
What is Nancy Ascher, MD's NPI number? ▼
Nancy Ascher, MD's National Provider Identifier (NPI) is 1396799516, issued on 05/20/2006.
How many Transplant Surgery Physician providers are there in the US? ▼
There are 1,025 Transplant Surgery Physician providers across 48 states in the US. The average Transplant Surgery Physician provider writes 275 Medicare Part D claims per year.
What drugs does Nancy Ascher, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Nancy Ascher, MD's most frequently prescribed drugs include Sulfamethoxazole-Trimethoprim, Omeprazole, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nancy Ascher, MD accept Medicare? ▼
Nancy Ascher, MD appears in CMS Medicare data with 180 Part D claims and 24 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nancy Ascher, MD's credentials? ▼
Nancy Ascher, MD's NPI is 1396799516 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.