Gregory Scott Houghton, M.D.
Critical Care Medicine (Internal Medicine) Physician · Santa Rosa, CA
Gregory Scott Houghton, M.D. is a critical care medicine (internal medicine) physician with a practice address in Santa Rosa, California, and NPI 1649489402, issued on May 21, 2007. Check the license (California A121765, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Scott Houghton
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License numbers
- A121765 CA
4301087479 MI
Self-reported in NPPES; status is on the state search - Practice location
- 500 Doyle Park Dr, Santa Rosa, CA 95405
- Phone
- (707) 303-8360
- Enumerated
- May 21, 2007
- Record last updated
- Jan 23, 2025
- Fax
- (707) 303-8361
- Medicare enrollment
- Enrolled (PECOS I20120918000502); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →
Also registered at 500 Doyle Park Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Chad Barylski, NP-C, RN, DC, DACBSPNurse Practitioner1932358553
- Joshua Beirne, M.D.Gastroenterology Physician1841216041
- George Bisbee, MDInternal Medicine Physician1235122516
- Deborah Britt, M.D.Pediatrics Physician1316959307
Verify Gregory Scott Houghton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121765Check 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
- Providence Medical FoundationSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Scott Houghton among 723 critical care medicine (internal medicine) physician records in California
Gregory Scott Houghton, M.D. is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% 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 40% of them.
- NPI issued2007 · 40% of these records are older, 46% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2006 · median 2005 among the 559 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
All 723 in California → Every provider in Santa Rosa → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Gina Chen, MDSanta Rosa, CA 954051497773808
- Hyun Kang, MDSanta Rosa, CA 954051316917883
- Vadim Leyenson, MDSanta Rosa, CA 954041427052851
- Daniel Loube, MDSanta Rosa, CA 954041588690051
- Thomas Nuckton, M.D.Santa Rosa, CA 954041003902834
- James Driscoll, M.D.Santa Rosa, CA 954031013094515
- Monica Minguillon, MDSanta Rosa, CA 954031912081902
- Mindy Shapiro, MDSanta Rosa, CA 954031114001112
Common questions
What is Gregory Scott Houghton, M.D.'s NPI number?
Gregory Scott Houghton, M.D.'s National Provider Identifier (NPI) is 1649489402, issued on May 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Scott Houghton, M.D. located?
The NPPES record lists a practice address at 500 Doyle Park Dr, Santa Rosa, CA, 95405. Phone: (707) 303-8360. Providers update this record themselves, so call before visiting.
How can I verify Gregory Scott Houghton, M.D.'s license?
NPPES lists California license number A121765, 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.