Justin N. Grammy, DO
Hospitalist Physician · San Luis Obispo, CA
Justin N. Grammy, DO is a hospitalist physician with a practice address in San Luis Obispo, California, and NPI 1003254483, issued on Jun 7, 2013. Check the license (California 16620, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Justin N. Grammy
- Credential
- DO
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 16620 CA
OS018634 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1428 Phillips LN Ste 203, San Luis Obispo, CA 93401
- Phone
- (805) 543-4407
- Enumerated
- Jun 7, 2013
- Record last updated
- Nov 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (805) 543-4587
- Medicare enrollment
- Enrolled (PECOS I20180901000074); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1428 Phillips LN Ste 203
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Canfield, M.D., PH.D.Infectious Disease Physician1144632159
- Elizabeth Cartozian, NPFamily Nurse Practitioner1851047443
- Ross Michel, M.DPulmonary Disease Physician1871633784
- Michael Ryan, M.DPulmonary Disease Physician1700863511
- Laura Slaughter, RN, FNP-CFamily Nurse Practitioner1245913383
Verify Justin N. Grammy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 16620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Central Coast Chest Consultants, A Medical CorporationSan Luis Obispo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin N. Grammy among 3,099 hospitalist physician records in California
Justin N. Grammy, DO 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 San Luis Obispo → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Julie Gelman, MDSan Luis Obispo, CA 934011962461046
- Pravir Vatsa, MDSan Luis Obispo, CA 934011003912239
- Ann Bollay, MDSan Luis Obispo, CA 934051487610333
- Ashlynn Gordon, D.O.San Luis Obispo, CA 934051255779641
- Olga Grigorieva Olson, M.D. PH.D.San Luis Obispo, CA 934051780046243
- Sarfaraz Mansuri, MDSan Luis Obispo, CA 934051508178088
- Gordon Ryan, MDSan Luis Obispo, CA 934051396824546
- Cindy Su, M.D.San Luis Obispo, CA 934051285088211
Common questions
What is Justin N. Grammy, DO's NPI number?
Justin N. Grammy, DO's National Provider Identifier (NPI) is 1003254483, issued on Jun 7, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Justin N. Grammy, DO located?
The NPPES record lists a practice address at 1428 Phillips LN Ste 203, San Luis Obispo, CA, 93401. Phone: (805) 543-4407. Providers update this record themselves, so call before visiting.
How can I verify Justin N. Grammy, DO's license?
NPPES lists California license number 16620, 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.
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.