Catherine Seo, MD
Emergency Medicine Physician · Monterey, CA
Catherine Seo, MD is an emergency medicine physician with a practice address in Monterey, California, and NPI 1265690135, issued on May 28, 2008. Check the license (California A138671, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Seo
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A138671 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23625 Holman Hwy, Monterey, CA 93940
- Phone
- (831) 625-4945
- Enumerated
- May 28, 2008
- Record last updated
- Dec 15, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160714000632); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 23625 Holman Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine Seo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A138671Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average emergency medicine physician in 2024
115 Medicare Part D claims for 71 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Naproxen19 claims
- Hydrocodone-Acetaminophen14 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): 84 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).
Industry payments in 2024: $77.57
3 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Community Hospital OF The Monterey PeninsulaMonterey, CA · Acute Care Hospitals4 of 5 stars
- Monterey Bay Observation MedicineMonterey, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Catherine Seo among 7,751 emergency medicine physician records in California
Catherine Seo, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2009 · median 2011 among the 4,560 with a school on file
- Record last updated2017 · 59% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Monterey → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Andres Aldrete, M.D.Monterey, CA 939401679580831
- Sameer Bakhda, M.D.Monterey, CA 939401225228851
- Reb Julia Haas Close, M.D.Monterey, CA 939401043226830
- Jamie Dermon, M.D.Monterey, CA 939401609047729
- John Ellison, M.D.Monterey, CA 939401093845943
- Paul File, M.D.Monterey, CA 939401720195266
- Eliud Garcia, MDMonterey, CA 939401174611180
- John Hage, M.D.Monterey, CA 939401548277999
Common questions
What is Catherine Seo, MD's NPI number?
Catherine Seo, MD's National Provider Identifier (NPI) is 1265690135, issued on May 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Seo, MD located?
The NPPES record lists a practice address at 23625 Holman Hwy, Monterey, CA, 93940. Phone: (831) 625-4945. Providers update this record themselves, so call before visiting.
How can I verify Catherine Seo, MD's license?
NPPES lists California license number A138671, 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 Catherine Seo, MD prescribe under Medicare Part D?
In 2024, Catherine Seo, MD had 115 Medicare Part D claims for 71 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Catherine Seo, MD's MIPS final score?
The 2023 MIPS final score is 84 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.