NPPES file of Aug 9, 2026

Mark D. Chilton, M.D.

Specialist · Frederick, MD

Mark D. Chilton, M.D. is a specialist with a practice address in Frederick, Maryland, and NPI 1689644072, issued on Jan 26, 2006. Check the license (Maryland D33237, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1689644072
Name
Mark D. Chilton
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
D33237 MD
Self-reported in NPPES; status is on the state search
Practice location
86 Thomas Johnson CT, Frederick, MD 21702
Phone
(301) 694-8311
Enumerated
Jan 26, 2006
Record last updated
Jun 6, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(301) 694-3537
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest specialist records → All 938 in Maryland → Look up another NPI →

Also registered at 86 Thomas Johnson CT

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Rommie Abele, PASurgical Physician Assistant1275792095
  2. George Adams, PTPhysical Therapist1063608370
  3. Jennilee Ambush, OTOccupational Therapist1649463852
  4. Christopher Berman, M.D.Physical Medicine & Rehabilitation Physician1194796219
  5. Neeti Bhargava, M.D.Rheumatology Physician1588634018
  6. Eileen Blahut, PTPhysical Therapist1235428442

Verify Mark D. Chilton in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Maryland board licenses this profession
    Search for license D33237    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Maryland license search

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98% fewer Medicare Part D claims than the average specialist in 2024

33 Medicare Part D claims for 13 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.

  1. Mark Chilton33
  2. Specialty average1,380

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.

Mark D. Chilton among 938 specialist records in Maryland

Mark D. Chilton, M.D. is one of 938 specialist records with a practice address in Maryland. 36% 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 17% of them.

  • NPI issued2006 · 17% of these records are older, 39% newer
  • In a Medicare fileYes · 36% of these records are
  • In the CMS Doctors and Clinicians fileNo · 23% of these records are
  • Record last updated2020 · 72% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in Maryland

There are 938 specialist records in Maryland.

All 938 in Maryland → Every provider in Frederick → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Laura Copaken, MDFrederick, MD 217021043268642
  2. Prafull Dave, MD PAFrederick, MD 217021326008582
  3. Melissa Esposito, M.D.Frederick, MD 217021023003464
  4. Jeffrey Gilsdorf, M.D.Frederick, MD 217021477524486
  5. John Henry, M.D.Frederick, MD 217021013982784
  6. Robert Jackson, M.D.Frederick, MD 217021164442406
  7. Charles Kim, M.DFrederick, MD 217021295736338
  8. David Kossoff, M.D.Frederick, MD 217021629152582

Common questions

What is Mark D. Chilton, M.D.'s NPI number?

Mark D. Chilton, M.D.'s National Provider Identifier (NPI) is 1689644072, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark D. Chilton, M.D. located?

The NPPES record lists a practice address at 86 Thomas Johnson CT, Frederick, MD, 21702. Phone: (301) 694-8311. Providers update this record themselves, so call before visiting.

How can I verify Mark D. Chilton, M.D.'s license?

NPPES lists Maryland license number D33237, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.

How much does Mark D. Chilton, M.D. prescribe under Medicare Part D?

In 2024, Mark D. Chilton, M.D. had 33 Medicare Part D claims for 13 beneficiaries; the average among specialist prescribers was 1,380. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.