Pilaipun Williams, M.D.
Internal Medicine Physician · Saint Louis, MO
Pilaipun Williams, M.D. is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1437194784, issued on Jun 19, 2006. Check the license (Missouri 2004023928, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Pilaipun Williams
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2004023928 MO
Self-reported in NPPES; status is on the state search - Practice location
- 5701 Chippewa St, Saint Louis, MO 63109
- Phone
- (314) 932-5690
- Enumerated
- Jun 19, 2006
- Record last updated
- Sep 16, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (314) 932-5692
- Medicaid ID
- 200778900 MO
- Medicare enrollment
- Enrolled (PECOS I20060322000050); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Kansas City, School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 5701 Chippewa St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Armbruster, M.D.Family Medicine Physician1518930502
Verify Pilaipun Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2004023928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
153 Medicare Part D claims for 111 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Azithromycin21 claims
- Methylprednisolone16 claims
- Amoxicillin15 claims
- Cyclobenzaprine Hcl11 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
- Fast Track Medical LLCFlorissant, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pilaipun Williams among 2,604 internal medicine physician records in Missouri
Pilaipun Williams, 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2001 · median 2006 among the 1,443 with a school on file
- Record last updated2011 · 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).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jaime Aguinaldo, MDSaint Louis, MO 631091407955099
- James Compton, M.D.Saint Louis, MO 631091336133321
- Patrick Durbin, MDSt Louis, MO 631091023079928
- James Ginther, M.D.Saint Louis, MO 631091285624643
- Scott Kirchner, MDSaint Louis, MO 631091811981715
- Patrick McCann, MDSt Louis, MO 631091437275963
- Andrea Philip, MDSaint Louis, MO 631091063098713
- Arjun Singh, M.D.Saint Louis, MO 631091780619957
Common questions
What is Pilaipun Williams, M.D.'s NPI number?
Pilaipun Williams, M.D.'s National Provider Identifier (NPI) is 1437194784, issued on Jun 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Pilaipun Williams, M.D. located?
The NPPES record lists a practice address at 5701 Chippewa St, Saint Louis, MO, 63109. Phone: (314) 932-5690. Providers update this record themselves, so call before visiting.
How can I verify Pilaipun Williams, M.D.'s license?
NPPES lists Missouri license number 2004023928, 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 Pilaipun Williams, M.D. prescribe under Medicare Part D?
In 2024, Pilaipun Williams, M.D. had 153 Medicare Part D claims for 111 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.
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.