NPPES file of Aug 9, 2026

Christopher Barclay Hamm, M.D.

Internal Medicine Physician · Des Peres, MO

Christopher Barclay Hamm, M.D. is an internal medicine physician with a practice address in Des Peres, Missouri, and NPI 1730490830, issued on Jun 23, 2010. Check the license (Missouri 2010019752, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; 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
1730490830
Name
Christopher Barclay Hamm
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
2010019752 MO
Self-reported in NPPES; status is on the state search
Practice location
1000 Des Peres RD, Des Peres, MO 63131
Phone
(314) 821-1313
Enumerated
Jun 23, 2010
Record last updated
Jan 23, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(314) 821-5670
Medicaid ID
1730490830 MO
Medicare enrollment
Enrolled (PECOS I20131004000461); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →

Also registered at 1000 Des Peres RD

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

  1. Delia Garcia, M.D.Radiation Oncology Physician1720016280
  2. Joseph Hilgeman, MDInternal Medicine Physician1407820145
  3. Thomas Panasci, M.D.Internal Medicine Physician1629051081
  4. Adam Ralko, MDInternal Medicine Physician1265751119
  5. Sarah Stolker, P.T.Physical Therapist1194979575
  6. Sanaa Waheed, M.D.Internal Medicine Physician1154513000

Verify Christopher Barclay Hamm in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2010019752    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
Open the Missouri license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

5.6 times the Medicare Part D claims of the average internal medicine physician in 2024

17,650 Medicare Part D claims for 1,137 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 920 claims were for opioids.

  1. Christopher Hamm17,650
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium1,707 claims
  2. Amlodipine Besylate659 claims
  3. Levothyroxine Sodium587 claims
  4. Pantoprazole Sodium502 claims
  5. Losartan Potassium424 claims
  6. Alprazolam419 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.

Industry payments in 2024: $14.99

1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Christopher Hamm$14.99
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Aging Well Health Care, LLCSaint Louis, MO
  2. Mercy Clinic East CommunitiesDes Peres, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Christopher Barclay Hamm among 2,604 internal medicine physician records in Missouri

Christopher Barclay Hamm, M.D. is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 52% of them.

  • NPI issued2010 · 52% of these records are older, 46% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 55% of these records are
  • Graduated2010 · median 2006 among the 1,443 with a school on file
  • Record last updated2015 · 48% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

6 internal medicine physician records list a practice address in Des Peres

They are 6 of the 140 NPPES records with a practice address in Des Peres, and 2,604 internal medicine physician records in Missouri.

All 2,604 in Missouri → Every provider in Des Peres → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Asim Ali, MDSaint Louis, MO 631311821047218
  2. Paul Altsheler, MDSaint Louis, MO 631311346225372
  3. Richard Bligh, MDSaint Louis, MO 631311306813050
  4. J Corder, MDSaint Louis, MO 631311184698987
  5. Thomas Greco, M.D.Saint Louis, MO 631311417920927
  6. Zahirul Haque, MDSaint Louis, MO 631311578536546
  7. Joseph Hilgeman, MDDes Peres, MO 631311407820145
  8. Andrea Holthaus, MDSaint Louis, MO 631311528031473

Common questions

What is Christopher Barclay Hamm, M.D.'s NPI number?

Christopher Barclay Hamm, M.D.'s National Provider Identifier (NPI) is 1730490830, issued on Jun 23, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Christopher Barclay Hamm, M.D. located?

The NPPES record lists a practice address at 1000 Des Peres RD, Des Peres, MO, 63131. Phone: (314) 821-1313. Providers update this record themselves, so call before visiting.

How can I verify Christopher Barclay Hamm, M.D.'s license?

NPPES lists Missouri license number 2010019752, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Christopher Barclay Hamm, M.D. prescribe under Medicare Part D?

In 2024, Christopher Barclay Hamm, M.D. had 17,650 Medicare Part D claims for 1,137 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.

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.