Aaron Charniak, MD
Hospitalist Physician · Rockville, MD
Aaron Charniak, MD is a hospitalist physician with a practice address in Rockville, Maryland, and NPI 1063827350, issued on Jun 25, 2014. Check the license (Maryland D85926, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Aaron Charniak
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- D85926 MD
289945 NY
Self-reported in NPPES; status is on the state search - Practice location
- 9901 Medical Center Dr, Rockville, MD 20850
- Phone
- (240) 826-6000
- Enumerated
- Jun 25, 2014
- Record last updated
- Jul 27, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180813000135); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 397 in Maryland → Look up another NPI →
Also registered at 9901 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Crystal Addison, P.T.Physical Therapist1407079577
- Olatejumade AdegbenroPharmacist1366889768
- Aaron Adler, PA-CPhysician Assistant1346571767
- Mehrdad Akhlaghi, MDInternal Medicine Physician1124019062
- Nelson Akwo, PHARM.D.Pharmacist1902054273
- Jude Alexander, MDPsychiatry Physician1093706939
Verify Aaron Charniak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D85926Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average hospitalist physician in 2024
87 Medicare Part D claims for 41 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
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.
Bills Medicare through 2 group practices
- Greater Baltimore Medical Center IncBaltimore, MD
- Medstar Medical Group II LLCWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Charniak among 397 hospitalist physician records in Maryland
Aaron Charniak, MD is one of 397 hospitalist physician records with a practice address in Maryland. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 58% of them.
- NPI issued2014 · 58% of these records are older, 36% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2014 · median 2010 among the 330 with a school on file
- Record last updated2018 · 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 208M00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Maryland
There are 397 hospitalist physician records in Maryland.
All 397 in Maryland → Every provider in Rockville → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Belay Atnafu, MDRockville, MD 208501548448822
- Heather Davies, MDRockville, MD 208501164585402
- Kimberly McCabe, MDRockville, MD 208501457567661
- Daniel Johnson, MDRockville, MD 208521215113972
- Asima Cheema, M.DAshton, MD 208611144583808
- Vladimir Rakhmanin, MDOlney, MD 208321275524167
- Maria Isabel Villanueva, M.D.Olney, MD 208321679748800
- Brittany ShepherdBethesda, MD 208241831588789
Common questions
What is Aaron Charniak, MD's NPI number?
Aaron Charniak, MD's National Provider Identifier (NPI) is 1063827350, issued on Jun 25, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Charniak, MD located?
The NPPES record lists a practice address at 9901 Medical Center Dr, Rockville, MD, 20850. Phone: (240) 826-6000. Providers update this record themselves, so call before visiting.
How can I verify Aaron Charniak, MD's license?
NPPES lists Maryland license number D85926, 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 Aaron Charniak, MD prescribe under Medicare Part D?
In 2024, Aaron Charniak, MD had 87 Medicare Part D claims for 41 beneficiaries; the average among hospitalist physician prescribers was 521. 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.