Michael Aaron Gnatt, MD
Internal Medicine Physician · Rockville, MD
Michael Aaron Gnatt, MD is an internal medicine physician with a practice address in Rockville, Maryland, and NPI 1255392866, issued on Mar 31, 2006. Check the license (Maryland D0066915, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Michael Aaron Gnatt
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- D0066915 MD
204857 NY
Self-reported in NPPES; status is on the state search - Practice location
- 14955 Shady Grove RD, Rockville, MD 20850
- Phone
- (301) 990-3193
- Enumerated
- Mar 31, 2006
- Record last updated
- May 9, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (301) 990-3199
- Entity
- Type 1 · individual
Also registered at 14955 Shady Grove RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Aaron Gnatt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0066915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,125 Medicare Part D claims for 66 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium91 claims
- Levothyroxine Sodium60 claims
- Amlodipine Besylate40 claims
- Losartan Potassium40 claims
- Famotidine33 claims
- Rosuvastatin Calcium31 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.
179 internal medicine physician records list a practice address in Rockville
They are 179 of the 14,353 NPPES records with a practice address in Rockville, and 3,904 internal medicine physician records in Maryland.
All 179 in Rockville → All 3,904 in Maryland → Every provider in Rockville →
Other internal medicine physician records in Maryland
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- Rasheed Abassi, M.D.Clinton, MD1376608620
- Ghulam Abbas, MDFrederick, MD1477658045
- Shamima Abbas, MDKensington, MD1750445896
- Nourelhuda Abbas Hamed, MDSilver Spring, MD1699339473
- Arsalan Abbasi, MDWestminster, MD1942762604
- Hamdi AbdeenGaithersburg, MD1245972413
- Mukemil Abdella, M.D.Glenn Dale, MD1871603381
- Suzan Abdo, MDClarksville, MD1588631824
- Madeeha Abdul GhaffarElkton, MD1194276063
Common questions
What is Michael Aaron Gnatt, MD's NPI number?
Michael Aaron Gnatt, MD's National Provider Identifier (NPI) is 1255392866, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Aaron Gnatt, MD located?
The NPPES record lists a practice address at 14955 Shady Grove RD, Rockville, MD, 20850. Phone: (301) 990-3193. Providers update this record themselves, so call before visiting.
How can I verify Michael Aaron Gnatt, MD's license?
NPPES lists Maryland license number D0066915, 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 Michael Aaron Gnatt, MD prescribe under Medicare Part D?
In 2024, Michael Aaron Gnatt, MD had 1,125 Medicare Part D claims for 66 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.