Ronald James Sager, M.D.
Psychiatry Physician · Santa Cruz, CA
Ronald James Sager, M.D. is a psychiatry physician with a practice address in Santa Cruz, California, and NPI 1780739706, issued on Jan 23, 2007. Check the license (California G84858, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald James Sager
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G84858 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1663 Dominican Way Ste 214, Santa Cruz, CA 95065
- Phone
- (831) 515-7180
- Enumerated
- Jan 23, 2007
- Record last updated
- Apr 21, 2026
- Fax
- (831) 401-2460
- Medicaid ID
- 00G848580 CA
- Medicare enrollment
- Enrolled (PECOS I20050629000651); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1663 Dominican Way Ste 214
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Luther, M.D.Psychiatry Physician1437184660
Verify Ronald James Sager in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G84858Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average psychiatry physician in 2024
877 Medicare Part D claims for 65 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Clonazepam65 claims
- Lorazepam63 claims
- Lamotrigine39 claims
- Alprazolam37 claims
- Bupropion Hcl Sr34 claims
- Aripiprazole32 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: $27.11
1 payment: food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 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.
Ronald James Sager among 8,673 psychiatry physician records in California
Ronald James Sager, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% 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 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1993 · median 2005 among the 3,295 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Santa Cruz → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Catherine Borchert, MDSanta Cruz, CA 950651992918692
- Mark Kasprow, M.D.Santa Cruz, CA 950651902122112
- Andrew Kumasaka, M.D.Santa Cruz, CA 950651346373487
- Paul Luther, M.D.Santa Cruz, CA 950651437184660
- Freddie Weinstein, M.D.Santa Cruz, CA 950651205980729
- Jennifer Athey, M.D.Scotts Valley, CA 950661124329198
- Shuyun Lo, M.D.Santa Cruz, CA 950641508807140
- Danit Bar Ziv, MDSanta Cruz, CA 950621073956579
Common questions
What is Ronald James Sager, M.D.'s NPI number?
Ronald James Sager, M.D.'s National Provider Identifier (NPI) is 1780739706, issued on Jan 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ronald James Sager, M.D. located?
The NPPES record lists a practice address at 1663 Dominican Way Ste 214, Santa Cruz, CA, 95065. Phone: (831) 515-7180. Providers update this record themselves, so call before visiting.
How can I verify Ronald James Sager, M.D.'s license?
NPPES lists California license number G84858, 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 Ronald James Sager, M.D. prescribe under Medicare Part D?
In 2024, Ronald James Sager, M.D. had 877 Medicare Part D claims for 65 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.