John Hayward Hammond, MD
Pediatrics Physician · Baltimore, MD
John Hayward Hammond, MD is a pediatrics physician with a practice address in Baltimore, Maryland, and NPI 1477012300, issued on Mar 19, 2019. Check the license (Maryland D93745, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John Hayward Hammond
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- D93745 MD
Self-reported in NPPES; status is on the state search - Practice location
- 600 N Wolfe St, Baltimore, MD 21287
- Phone
- (248) 225-6176
- Enumerated
- Mar 19, 2019
- Record last updated
- Apr 30, 2025
- Medicare enrollment
- Enrolled (PECOS I20250516000334); may accept Medicare assignment
- Medical or professional school
- Warren Alpert Medical School Of Brown University, 2019
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 1,842 in Maryland → Look up another NPI →
Also registered at 600 N Wolfe St
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Verify John Hayward Hammond in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D93745Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Johns Hopkins UniversityBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Hayward Hammond among 1,842 pediatrics physician records in Maryland
John Hayward Hammond, MD is one of 1,842 pediatrics physician records with a practice address in Maryland. 35% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 89% of them.
- NPI issued2019 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 35% of these records are
- In the CMS Doctors and Clinicians fileYes · 9% of these records are
- Graduated2019 · median 2008 among the 162 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
522 pediatrics physician records list a practice address in Baltimore
They are 522 of the 35,183 NPPES records with a practice address in Baltimore, and 1,842 pediatrics physician records in Maryland.
All 1,842 in Maryland → Every provider in Baltimore → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Hoover Adger, M.D.Baltimore, MD 212871265495949
- Marilee Allen, M.D.Baltimore, MD 212871861457350
- Brian Alverson, MDBaltimore, MD 212871841244399
- Jennifer Anders, M.D.Baltimore, MD 212871821052184
- Joel Brenner, M.D.Baltimore, MD 212871477511533
- Tina Cheng, M.D.Baltimore, MD 212871164471041
- Jeffrey Keefer, M.D.Baltimore, MD 212871528015708
- Julia McMillan, M.D.Baltimore, MD 212871225088578
Common questions
What is John Hayward Hammond, MD's NPI number?
John Hayward Hammond, MD's National Provider Identifier (NPI) is 1477012300, issued on Mar 19, 2019. An NPI identifies a provider in billing; it is not a license.
Where is John Hayward Hammond, MD located?
The NPPES record lists a practice address at 600 N Wolfe St, Baltimore, MD, 21287. Phone: (248) 225-6176. Providers update this record themselves, so call before visiting.
How can I verify John Hayward Hammond, MD's license?
NPPES lists Maryland license number D93745, 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.
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.