Grant Watson Gerdelman, M.D.
Emergency Medicine Physician · Saint Louis, MO
Grant Watson Gerdelman, M.D. is an emergency medicine physician with a practice address in Saint Louis, Missouri, and NPI 1215292933, issued on Jul 9, 2012. Check the license (Missouri 2012023082, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Grant Watson Gerdelman
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 2012023082 MO
036.143211 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3635 Vista Ave, Saint Louis, MO 63110
- Phone
- (314) 577-8780
- Enumerated
- Jul 9, 2012
- Record last updated
- Jul 25, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (314) 577-8516
- Medicare enrollment
- Enrolled (PECOS I20170724000649); may accept Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Also registered at 3635 Vista Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michelle Adorjan, ACNPAcute Care Nurse Practitioner1982729950
- Lisa Alderson, M.D.Specialist1538102561
- Georgios Alexopoulos, MDNeurological Surgery Physician1417309097
- Kathleen Andersen, KATHLEEN KNEBELSBERGAnesthesiologist Assistant1306097464
Verify Grant Watson Gerdelman 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 2012023082Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average emergency medicine physician in 2024
167 Medicare Part D claims for 105 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Prednisone20 claims
- Hydrocodone-Acetaminophen17 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 96.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Ahs IL Medical Group LLCGranite City, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Watson Gerdelman among 1,405 emergency medicine physician records in Missouri
Grant Watson Gerdelman, M.D. is one of 1,405 emergency medicine physician records with a practice address in Missouri. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 58% of them.
- NPI issued2012 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2012 · median 2012 among the 808 with a school on file
- Record last updated2017 · 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 207P00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
398 emergency medicine physician records list a practice address in Saint Louis
They are 398 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,405 emergency medicine physician records in Missouri.
All 1,405 in Missouri → Every provider in Saint Louis → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- David Amin, MDSaint Louis, MO 631101528003787
- Brian Cohn, MDSaint Louis, MO 631101649206061
- Brian Froelke, MDSaint Louis, MO 631101114951233
- Gary Gambill, MDSaint Louis, MO 631101346282837
- Richard Griffey, MDSaint Louis, MO 631101023075405
- Kamal Gursahani, MDSaint Louis, MO 631101396760849
- Reuben Johnson, MDSaint Louis, MO 631101174563217
- Richard Schmidt, MDSaint Louis, MO 631101437133501
Common questions
What is Grant Watson Gerdelman, M.D.'s NPI number?
Grant Watson Gerdelman, M.D.'s National Provider Identifier (NPI) is 1215292933, issued on Jul 9, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Grant Watson Gerdelman, M.D. located?
The NPPES record lists a practice address at 3635 Vista Ave, Saint Louis, MO, 63110. Phone: (314) 577-8780. Providers update this record themselves, so call before visiting.
How can I verify Grant Watson Gerdelman, M.D.'s license?
NPPES lists Missouri license number 2012023082, 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 Grant Watson Gerdelman, M.D. prescribe under Medicare Part D?
In 2024, Grant Watson Gerdelman, M.D. had 167 Medicare Part D claims for 105 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Grant Watson Gerdelman, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.