NPPES file of Aug 9, 2026

Gurprakash Singh Grewal, M.D.

Family Medicine Physician · Saint Louis, MO

Gurprakash Singh Grewal, M.D. is a family medicine physician with a practice address in Saint Louis, Missouri, and NPI 1134343379, issued on Apr 12, 2007. Check the license (Missouri MD36667, 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
1134343379
Name
Gurprakash Singh Grewal
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
MD36667 MO
Self-reported in NPPES; status is on the state search
Practice location
3535 S Jefferson Ave, Saint Louis, MO 63118
Phone
(314) 772-5070
Enumerated
Apr 12, 2007
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Medicaid ID
202286035 MO
Medicare enrollment
Enrolled (PECOS I20120509000669); accepts Medicare assignment
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.
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8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →

Also registered at 3535 S Jefferson Ave

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

  1. Susan Akins, MSN RN BC AP MHCNSClinical Nurse Specialist1790767721
  2. Mudasir Asif, M.D.Psychiatry Physician1265797898
  3. Carol Blacksher, APRN BCNurse Practitioner1245249382
  4. Audrey Caramanna, NPNurse Practitioner1689738569
  5. Polly David, MDInfectious Disease Physician1649501834
  6. Dang Do, D.P.M.Foot Surgery Podiatrist1184829277

Verify Gurprakash Singh Grewal 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 MD36667    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.

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3.0 times the Medicare Part D claims of the average family medicine physician in 2024

10,804 Medicare Part D claims for 154 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 1,655 claims were for opioids.

  1. Gurprakash Grewal10,804
  2. Specialty average3,544

Most prescribed

  1. Oxycodone-Acetaminophen982 claims
  2. Alprazolam437 claims
  3. Gabapentin411 claims
  4. Oxycodone Hcl319 claims
  5. Hydrocodone-Acetaminophen269 claims
  6. Promethazine Hcl248 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: $409.88

6 payments; by number, the most common kind was food and beverage; the largest payer was Sumitomo Pharma America, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Gurprakash Grewal$409.88
  2. Specialty average$902.55

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

Gurprakash Singh Grewal among 2,991 family medicine physician records in Missouri

Gurprakash Singh Grewal, M.D. is one of 2,991 family medicine physician records with a practice address in Missouri. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.

  • NPI issued2007 · 48% of these records are older, 44% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated1981 · median 2006 among the 1,778 with a school on file
  • Record last updated2007 · 53% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Family Medicine Physician providers in Missouri

There are 2,991 family medicine physician records in Missouri.

All 2,991 in Missouri → Every provider in Saint Louis → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Andrea Brown, DOSaint Louis, MO 631181548897499
  2. Josephine Glaser, M.D.Saint Louis, MO 631181407887979
  3. Devon Golding, MDSaint Louis, MO 631181942288006
  4. Abigail Grant, MDSaint Louis, MO 631181427790823
  5. Timothy Hutchison, M.D.Saint Louis, MO 631181881636702
  6. Thomas Kuciejczyk-Kernan, M.D.Saint Louis, MO 631181669478970
  7. Jason Woody, DOSaint Louis, MO 631181295304103
  8. Gopy Arumugam, M.D.Saint Louis, MO 631171891059531

Common questions

What is Gurprakash Singh Grewal, M.D.'s NPI number?

Gurprakash Singh Grewal, M.D.'s National Provider Identifier (NPI) is 1134343379, issued on Apr 12, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Gurprakash Singh Grewal, M.D. located?

The NPPES record lists a practice address at 3535 S Jefferson Ave, Saint Louis, MO, 63118. Phone: (314) 772-5070. Providers update this record themselves, so call before visiting.

How can I verify Gurprakash Singh Grewal, M.D.'s license?

NPPES lists Missouri license number MD36667, 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 Gurprakash Singh Grewal, M.D. prescribe under Medicare Part D?

In 2024, Gurprakash Singh Grewal, M.D. had 10,804 Medicare Part D claims for 154 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.