Cathy Castagna, D.O.
Internal Medicine Physician · Sacramento, CA
Cathy Castagna, D.O. is an internal medicine physician with a practice address in Sacramento, California, and NPI 1295078301, issued on Mar 27, 2013. Check the license (California A13733, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cathy Castagna
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A13733 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2025 Morse Ave, Sacramento, CA 95825
- Phone
- (916) 973-5000
- Enumerated
- Mar 27, 2013
- Record last updated
- Feb 11, 2022
- Medicare enrollment
- Enrolled (PECOS I20161122000934); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2013
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2025 Morse Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Cathy Castagna in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A13733Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
329 Medicare Part D claims for 103 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium20 claims
- Metoprolol Succinate18 claims
- Amlodipine Besylate14 claims
- Amoxicillin-Clavulanate Potass12 claims
- Furosemide12 claims
- Losartan Potassium12 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: $114.68
1 payment: food and beverage; the largest payer was Kedrion Biopharma, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Bills Medicare through one group practice
- Permanente Medical Group IncSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cathy Castagna among 17,696 internal medicine physician records in California
Cathy Castagna, D.O. 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
601 internal medicine physician records list a practice address in Sacramento
They are 601 of the 33,083 NPPES records with a practice address in Sacramento, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sacramento → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Eliot Mah, MDSacramento, CA 958251982782660
- John Morelli, M.DSacramento, CA 958251841386653
Common questions
What is Cathy Castagna, D.O.'s NPI number?
Cathy Castagna, D.O.'s National Provider Identifier (NPI) is 1295078301, issued on Mar 27, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Cathy Castagna, D.O. located?
The NPPES record lists a practice address at 2025 Morse Ave, Sacramento, CA, 95825. Phone: (916) 973-5000. Providers update this record themselves, so call before visiting.
How can I verify Cathy Castagna, D.O.'s license?
NPPES lists California license number A13733, 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 Cathy Castagna, D.O. prescribe under Medicare Part D?
In 2024, Cathy Castagna, D.O. had 329 Medicare Part D claims for 103 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.