Dianna Yan, M.D.
Obstetrics & Gynecology Physician · Gaithersburg, MD
Dianna Yan, M.D. is an obstetrics & gynecology physician with a practice address in Gaithersburg, Maryland, and NPI 1710928411, issued on Jun 10, 2006. Check the license (Maryland D43385, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Dianna Yan
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- D43385 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8909 Shady Grove CT, Gaithersburg, MD 20877
- Phone
- (301) 963-0900
- Enumerated
- Jun 10, 2006
- Record last updated
- Jul 16, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (301) 963-9694
- Medicaid ID
- 755631400 MD
- Medicare enrollment
- Enrolled (PECOS I20090804000007); may accept Medicare assignment
- Medical or professional school
- Texas Tech University Health Science Center School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,034 in Maryland → Look up another NPI →
Verify Dianna Yan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D43385Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
244 Medicare Part D claims for 79 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Clotrimazole-Betamethasone43 claims
- Fluconazole42 claims
- Terconazole25 claims
- Clindamycin Phosphate19 claims
- Cephalexin18 claims
- Alendronate Sodium16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $146.26
3 payments; by number, the most common kind was food and beverage; the largest payer was Inspire Medical Systems, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Dianna Yan among 1,034 obstetrics & gynecology physician records in Maryland
Dianna Yan, M.D. is one of 1,034 obstetrics & gynecology physician records with a practice address in Maryland. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1988 · median 2005 among the 597 with a school on file
- Record last updated2009 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Maryland
There are 1,034 obstetrics & gynecology physician records in Maryland.
All 1,034 in Maryland → Every provider in Gaithersburg → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Anders Apgar, MDGaithersburg, MD 208771831170638
- Janet Fried, MDGaithersburg, MD 208771932275120
- Amir Gohari, M.D.Gaithersburg, MD 208771386870152
- Sujithra Jayaraj-Sudarsan, M.D.Gaithersburg, MD 208771487831681
- Karishma Patel, M.D.Gaithersburg, MD 208771265609697
- Angela Thompson, MDGaithersburg, MD 208771124105549
- Shen-Sho Tseng, MDGaithersburg, MD 208771003996687
- Steve Yu, M.D.Gaithersburg, MD 208771710929724
Common questions
What is Dianna Yan, M.D.'s NPI number?
Dianna Yan, M.D.'s National Provider Identifier (NPI) is 1710928411, issued on Jun 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dianna Yan, M.D. located?
The NPPES record lists a practice address at 8909 Shady Grove CT, Gaithersburg, MD, 20877. Phone: (301) 963-0900. Providers update this record themselves, so call before visiting.
How can I verify Dianna Yan, M.D.'s license?
NPPES lists Maryland license number D43385, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Dianna Yan, M.D. prescribe under Medicare Part D?
In 2024, Dianna Yan, M.D. had 244 Medicare Part D claims for 79 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.