Gregory Ashton Bassmann, MD
Pulmonary Disease Physician · Baltimore, MD
Gregory Ashton Bassmann, MD is a pulmonary disease physician with a practice address in Baltimore, Maryland, and NPI 1174781611, issued on May 31, 2008. Check the license (Maryland D77581, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Gregory Ashton Bassmann
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- D77581 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6565 N Charles St, Baltimore, MD 21204
- Phone
- (443) 849-3901
- Enumerated
- May 31, 2008
- Record last updated
- Jul 19, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (443) 849-3902
- Medicare enrollment
- Enrolled (PECOS I20140819000478); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2008
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 342 in Maryland → Look up another NPI →
Also registered at 6565 N Charles St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gregory Ashton Bassmann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D77581Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
1,054 Medicare Part D claims for 203 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 61% of claims.
Most prescribed
- Albuterol Sulfate Hfa158 claims
- Trelegy Ellipta102 claims
- Montelukast Sodium80 claims
- Breztri Aerosphere77 claims
- Azelastine Hcl56 claims
- Prednisone55 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.
Bills Medicare through one group practice
- Greater Baltimore Medical Center IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Ashton Bassmann among 342 pulmonary disease physician records in Maryland
Gregory Ashton Bassmann, MD is one of 342 pulmonary disease physician records with a practice address in Maryland. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 71% of them.
- NPI issued2008 · 71% of these records are older, 24% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2008 · median 2000 among the 225 with a school on file
- Record last updated2016 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Maryland
There are 342 pulmonary disease physician records in Maryland.
All 342 in Maryland → Every provider in Baltimore → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Elisabeth Carr, M.D.Towson, MD 212041184777104
- Marie Chatham, M.D.Towson, MD 212041104916691
- Jennifer Chiurco, MDTowson, MD 212041184129280
- Chelsi Green, MDBaltimore, MD 212041871082099
- Hassan MakhzoumiTowson, MD 212041912993031
- Jack Nissim, M./D.Towson, MD 212041316029291
- Chahat Puri, M.D.Towson, MD 212041235798141
- Ji Hyun RheeBaltimore, MD 212041740593136
Common questions
What is Gregory Ashton Bassmann, MD's NPI number?
Gregory Ashton Bassmann, MD's National Provider Identifier (NPI) is 1174781611, issued on May 31, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Ashton Bassmann, MD located?
The NPPES record lists a practice address at 6565 N Charles St, Baltimore, MD, 21204. Phone: (443) 849-3901. Providers update this record themselves, so call before visiting.
How can I verify Gregory Ashton Bassmann, MD's license?
NPPES lists Maryland license number D77581, 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 Gregory Ashton Bassmann, MD prescribe under Medicare Part D?
In 2024, Gregory Ashton Bassmann, MD had 1,054 Medicare Part D claims for 203 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. 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.