Guillermo Ramirez
Hospitalist Physician · Santa Cruz, CA
Guillermo Ramirez is a hospitalist physician with a practice address in Santa Cruz, California, and NPI 1740623883, issued on Apr 8, 2013. Check the license (California A135768, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Guillermo Ramirez
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A135768 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1661 Soquel Dr, Santa Cruz, CA 95065
- Phone
- (831) 460-6042
- Enumerated
- Apr 8, 2013
- Record last updated
- Feb 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160707001475); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1661 Soquel Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brian Brunelli, MDNeurology Physician1417936568
- Shelly Brunner, NP-CAdult Health Nurse Practitioner1134523715
- Yolanda Cuadros, MDHospitalist Physician1619987203
- Scott Drew, D.O.Hospitalist Physician1952796047
- Michael Gansaeuer, M.D.Neurology Physician1386624807
- Donaldo Hernandez, M.D.Hospitalist Physician1588644470
Verify Guillermo Ramirez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A135768Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average hospitalist physician in 2024
99 Medicare Part D claims for 45 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
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 one group practice
- Sutter Bay Medical FoundationSanta Cruez, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guillermo Ramirez among 3,099 hospitalist physician records in California
Guillermo Ramirez is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 56% of them.
- NPI issued2013 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2013 · median 2010 among the 2,505 with a school on file
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Santa Cruz → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Jenifer Butler, M.D.Santa Cruz, CA 950651902950538
- William Cao, MDSanta Cruz, CA 950651932189529
- Cesar Castillo, MDSanta Cruz, CA 950651578735148
- Yolanda Cuadros, MDSanta Cruz, CA 950651619987203
- Richard Hamner, MDSanta Cruz, CA 950651588660401
- Rema Hanna, MDSanta Cruz, CA 950651265571202
- Donaldo Hernandez, M.D.Santa Cruz, CA 950651588644470
- Nhat Hoang, DOSanta Cruz, CA 950651215196480
Common questions
What is Guillermo Ramirez's NPI number?
Guillermo Ramirez's National Provider Identifier (NPI) is 1740623883, issued on Apr 8, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Ramirez located?
The NPPES record lists a practice address at 1661 Soquel Dr, Santa Cruz, CA, 95065. Phone: (831) 460-6042. Providers update this record themselves, so call before visiting.
How can I verify Guillermo Ramirez's license?
NPPES lists California license number A135768, 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 Guillermo Ramirez prescribe under Medicare Part D?
In 2024, Guillermo Ramirez had 99 Medicare Part D claims for 45 beneficiaries; the average among hospitalist physician prescribers was 521. 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.