2026 NPPES data Gynecology Physician NPI 1023188331 MD
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LEAH MILLHEISER, MD

Gynecology Physician in DUBLIN, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
228
Medicare Part D claims · 55 beneficiaries · Gynecology Physician avg: 295
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
76.5025/100
▼ 7 pts below national avg 83.1 · [object Object]

What the federal data shows

LEAH MILLHEISER, MD reported a CMS MIPS final score of 76.5025/100 — below the 83.1 national average — and filed 228 Medicare Part D claims in 2023.

76.5025/100
MIPS score · -7 vs avg
228
Part D claims, 2023
65%
generic prescribing
Likely
board-certified (heuristic)

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.

LEAH MILLHEISER, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

77 21st percentile higher than 21% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

LEAH MILLHEISER, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — 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 LEAH MILLHEISER, MD?

Below national average

NPI registry status

Active

Issued 11/08/2006

NPI 1023188331

Primary specialty

Gynecology Physician

Niche

3,902 US NPIs in this specialty

Medicare Part D claims

228 23% vs specialty avg

2023 prescription claims

Specialty avg: 295

MIPS final score

76.5025/100 6.597499999999997% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in California

How Gynecology Physician compares to other specialties among California providers

California providers

Gynecology Physician share within California

1. Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Gynecology Physician share within California

Medicare quality performance — MIPS

LEAH MILLHEISER, MD's 2023 MIPS final score plotted against the Gynecology Physician national average

Below national average
MIPS Final Score
76.5025/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Gynecology Physician) — 76.5025/100 vs national avg 83.1

0%100%National avg83%76.5%
MIPS final score (Gynecology Physician) — 76.5025/100 vs national avg 83.1

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).

LEAH MILLHEISER, MD appears in the CMS NPPES registry as a Gynecology Physician provider holding MD credentials at 4000 DUBLIN BLVD, DUBLIN, CA, 94568, with a listed phone of (925) 875-6546. NPI 1023188331 was issued on 11/08/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MILLHEISER most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 228 prescription claims written by this provider, covering 55 Medicare beneficiaries and totaling roughly $47K in drug spend, split 35% brand-name and 65% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 76.5025/100 for the 2023 performance year (Quality 74.3195, Cost 43.9595), compared with the national average of 83.1.

Gynecology Physician is a narrow specialty nationwide, with 3,902 enrolled providers across 53 states and an average of 295 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

4000 DUBLIN BLVD
DUBLIN, CA 94568

Provider Details

NPI 1023188331
Specialty Gynecology Physician
Credentials MD
Gender Female
NPI Issued 11/08/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

76.5025
Final Score
Avg: 83.1
74.3195
Quality
43.9595
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where LEAH MILLHEISER, 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.

SUTTER BAY MEDICAL FOUNDATION
FREMONT, 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 LEAH MILLHEISER, MD. To verify LEAH MILLHEISER, 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.

Brand vs generic prescribing mix · Above average

LEAH MILLHEISER, MD — brand share 35.0%
Specialty average (est.)

35% brand-name claims vs 65% generic, on 228 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

228
Total Claims
$47K
Total Drug Cost
55
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
458
Total Day Supply
13,313
Brand vs Generic
35% brand / 65% generic
Brand Drug Cost
$31K
Generic Drug Cost
$16K

Patient Demographics

Average Patient Age
68.9 years
Avg HCC Risk Score
0.84
Gender Split
100% female / 0% male
Age Distribution
<65: 11, 65-74: 32, 75-84: 12, 85+: 0

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What LEAH MILLHEISER, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Estradiol
77
Imvexxy
Estradiol
29
Yuvafem
Estradiol
22
Estradiol (Twice Weekly)
Estradiol
20
Premarin
"Estrogens
N/A
Progesterone
"Progesterone
N/A

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Gynecology Physician Overview

How LEAH MILLHEISER, MD fits within the Gynecology Physician landscape nationally.

3,902
Gynecology Physician Providers in US
53
States with Gynecology Physician
295
Avg Claims per Provider

LEAH MILLHEISER, MD's 228 claims are below the specialty average of 295.

Nearby Gynecology Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as MILLHEISER.

Compare Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LEAH MILLHEISER, MD's specialty?
LEAH MILLHEISER, MD specializes in Gynecology Physician and practices in DUBLIN, California. Credentials: MD.
How much does LEAH MILLHEISER, MD prescribe under Medicare Part D?
In 2023, LEAH MILLHEISER, MD wrote 228 Medicare Part D claims totaling $47K in drug costs for 55 beneficiaries.
What is LEAH MILLHEISER, MD's Medicare quality score?
LEAH MILLHEISER, MD has a CMS MIPS Final Score of 76.5025/100 (Quality: 74.3195, Cost: 43.9595). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is LEAH MILLHEISER, MD located?
LEAH MILLHEISER, MD is located at 4000 DUBLIN BLVD, DUBLIN, CA, 94568. Phone: (925) 875-6546.
What is LEAH MILLHEISER, MD's NPI number?
LEAH MILLHEISER, MD's National Provider Identifier (NPI) is 1023188331, issued on 11/08/2006.
Does LEAH MILLHEISER, MD prescribe more brand-name or generic drugs?
LEAH MILLHEISER, MD's prescribing is 35% brand-name and 65% generic drugs by claim count, with $31K in brand drug costs.
How many Gynecology Physician providers are there in the US?
There are 3,902 Gynecology Physician providers across 53 states in the US. The average Gynecology Physician provider writes 295 Medicare Part D claims per year.
What drugs does LEAH MILLHEISER, MD prescribe most often?
Based on 2023 Medicare Part D data, LEAH MILLHEISER, MD's most frequently prescribed drugs include Estradiol, Imvexxy, Yuvafem. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LEAH MILLHEISER, MD accept Medicare?
LEAH MILLHEISER, MD appears in CMS Medicare data with 228 Part D claims and 55 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LEAH MILLHEISER, MD's credentials?
LEAH MILLHEISER, MD's NPI is 1023188331 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

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