Ian Thomas Crumm, MD
Internal Medicine Physician · Santa Monica, CA
Ian Thomas Crumm, MD is an internal medicine physician with a practice address in Santa Monica, California, and NPI 1700407459, issued on May 5, 2020. Check the license (California A204688, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ian Thomas Crumm
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A204688 CA
MD-24569 HI
Self-reported in NPPES; status is on the state search - Practice location
- 2428 Santa Monica Blvd Ste 200, Santa Monica, CA 90404
- Phone
- (310) 998-5868
- Enumerated
- May 5, 2020
- Record last updated
- Oct 1, 2025
- Medicare enrollment
- Enrolled (PECOS I20250923003158); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2428 Santa Monica Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ian Thomas Crumm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A204688Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
251 Medicare Part D claims for 37 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Gabapentin17 claims
- Lisinopril14 claims
- Levetiracetam13 claims
- Metformin Hcl13 claims
- Pantoprazole Sodium13 claims
- Amitriptyline Hcl12 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 2 group practices
- Sound Physicians OF Hawaii IncKealakekua, HI
- The Regents OF The University OF CaliforniaSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian Thomas Crumm among 17,696 internal medicine physician records in California
Ian Thomas Crumm, MD is one of 17,696 internal medicine physician records with a practice address in California. 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 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
168 internal medicine physician records list a practice address in Santa Monica
They are 168 of the 5,151 NPPES records with a practice address in Santa Monica, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Monica → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Mark McGowan, MDSanta Monica, CA 904041720015902
- Alex Messina, MDSanta Monica, CA 904041902867823
- Mark Nachman, MDSanta Monica, CA 904041104803683
Common questions
What is Ian Thomas Crumm, MD's NPI number?
Ian Thomas Crumm, MD's National Provider Identifier (NPI) is 1700407459, issued on May 5, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ian Thomas Crumm, MD located?
The NPPES record lists a practice address at 2428 Santa Monica Blvd Ste 200, Santa Monica, CA, 90404. Phone: (310) 998-5868. Providers update this record themselves, so call before visiting.
How can I verify Ian Thomas Crumm, MD's license?
NPPES lists California license number A204688, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ian Thomas Crumm, MD prescribe under Medicare Part D?
In 2024, Ian Thomas Crumm, MD had 251 Medicare Part D claims for 37 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.