NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1710928411 M.D.
Verify on CMS → Dianna Yan, M.D.
Obstetrics & Gynecology Physician in Gaithersburg, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,326 in Obstetrics & Gynecology 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
216
Medicare Part D claims · 53 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$146.26
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Dianna Yan, M.D. filed 216 Medicare Part D claims in 2023 as an Obstetrics & Gynecology Physician in Gaithersburg, Maryland, prescribing 94% generic.
- 216
- Part D claims, 2023
- 94%
- generic prescribing
- $146.26
- industry payments (Sunshine Act)
- ≥49th
- 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 1710928411 · Obstetrics & Gynecology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1710928411
- ENUM-LEGACY 2006
- TAX-MID 44K Obstetrics &
- RX-LIGHT 216
- BOOK-LIGHT 1,006 in Maryland
- PHOTO-ENUM Nancy Petit · 2006
Dianna Yan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
216 ≥ 49th percentile 49% 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-eligible specialty (heuristic, not verified)
Dianna Yan, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Dianna Yan, M.D.?
Quality data not reportedPrimary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
216 21% vs specialty avg
Specialty distribution in Maryland
How Obstetrics & Gynecology Physician compares to other specialties among Maryland providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Obstetrics & Gynecology Physician. Verify directly:
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 | 1710928411 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/10/2006 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Dianna Yan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$146
Largest payer
Inspire Medical Systems, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Dianna Yan, M.D. - brand share 6.0%
Obstetrics & Gynecology Physician average
6% brand-name claims vs 94% generic, on 216 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.
216
Total Claims
$4K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 246
- Total Day Supply
- 4,191
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $814
- Generic Drug Cost
- $3K
- Antibiotic Claims
- 43
Patient Demographics
- Average Patient Age
- 69.2 years
- Avg HCC Risk Score
- 0.93
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dianna Yan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Fluconazole
Fluconazole
32 claims
- Terconazole
Terconazole
21 claims
- Clotrimazole-Betam…
Clotrimazole-Betamethasone
20 claims
- Cephalexin
Cephalexin
19 claims
- Alendronate Sodium
Alendronate Sodium
18 claims
- Clindamycin Phosph…
Clindamycin Phosphate
15 claims
- Metronidazole 12
Metronidazole
12 claims
| Drug | Claims |
|---|---|
| Fluconazole | 32 |
| Terconazole | 21 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 20 |
| Cephalexin | 19 |
| Alendronate Sodium | 18 |
| Clindamycin Phosphate | 15 |
| Metronidazole | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Obstetrics & Gynecology Physician Overview
How Dianna Yan, M.D. fits within the Obstetrics & Gynecology Physician landscape nationally.
44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider
Dianna Yan, M.D.'s 216 claims are above the specialty average of 179.
Nationwide Obstetrics & Gynecology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Yan, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Obstetrics & Gynecology Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Yan.
One of 1,006 Obstetrics & Gynecology Physician providers enrolled in Maryland, 5 are shown here.
Fouad Abbas
Baltimore, MD
Dr. Alexandra Abbate
MD
Baltimore, MD
Dr. Basma Abdo
M.D
Baltimore, MD
Dr. Tolani Abdulkadir
MD
Baltimore, MD
Dr. Sozdar Abed
MD
Easton, MD
Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Dianna Yan, M.D.'s specialty? ▼
Dianna Yan, M.D. specializes in Obstetrics & Gynecology Physician and practices in Gaithersburg, Maryland. Credentials: M.D..
How much does Dianna Yan, M.D. prescribe under Medicare Part D? ▼
In 2023, Dianna Yan, M.D. wrote 216 Medicare Part D claims totaling $4K in drug costs for 53 beneficiaries.
Where is Dianna Yan, M.D. located? ▼
Dianna Yan, M.D. is located at 8909 SHADY GROVE CT, Gaithersburg, MD, 20877. Phone: (301) 963-0900.
What is Dianna Yan, M.D.'s NPI number? ▼
Dianna Yan, M.D.'s National Provider Identifier (NPI) is 1710928411, issued on 06/10/2006.
Does Dianna Yan, M.D. prescribe more brand-name or generic drugs? ▼
Dianna Yan, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $814 in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does Dianna Yan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Dianna Yan, M.D.'s most frequently prescribed drugs include Fluconazole, Terconazole, Clotrimazole-Betamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dianna Yan, M.D. accept Medicare? ▼
Dianna Yan, M.D. appears in CMS Medicare data with 216 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dianna Yan, M.D.'s credentials? ▼
Dianna Yan, M.D.'s NPI is 1710928411 with credentials M.D.. 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.
- 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.