Christine Celeste Brennan, MD
Sleep Medicine (Internal Medicine) Physician · Redwood City, CA
Christine Celeste Brennan, MD is a sleep medicine (internal medicine) physician with a practice address in Redwood City, California, and NPI 1629657473, issued on Apr 7, 2021. Check the license (California A195905, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christine Celeste Brennan
- Credential
- MD
- Primary taxonomy
- Sleep Medicine (Internal Medicine) Physician 207RS0012X
- License number
- A195905 CA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Broadway St FL 2, Redwood City, CA 94063
- Phone
- (507) 236-6016
- Enumerated
- Apr 7, 2021
- Record last updated
- Mar 11, 2026
- Medicare enrollment
- Enrolled (PECOS I20251118002378); accepts Medicare assignment
- Medical or professional school
- University Of Toledo College Of Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest sleep medicine (internal medicine) physician records → All 129 in California → Look up another NPI →
Also registered at 450 Broadway St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Luis Gasca, MDSleep Medicine (Internal Medicine) Physician1740920784
- Shantha Gowda, PSYDPsychologist1992367882
- Krystal Jin, MDStudent in an Organized Health Care Education/Training Program1821618018
- Andrea Nguyen, MDSleep Medicine (Internal Medicine) Physician1417698929
- Hope Wang, MDStudent in an Organized Health Care Education/Training Program1225615636
Verify Christine Celeste Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A195905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024
196 Medicare Part D claims for 46 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium15 claims
- Losartan Potassium11 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: $54.99
1 payment: education; the largest payer was Harmony Biosciences LLC. The 664 providers of this specialty with any payment received $3,724.37 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
- University OF Utah Adult ServicesSalt Lake City, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christine Celeste Brennan among 129 sleep medicine (internal medicine) physician records in California
Christine Celeste Brennan, MD is one of 129 sleep medicine (internal medicine) physician records with a practice address in California. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 5% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2021 · median 2006 among the 106 with a school on file
- Record last updated2026 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sleep Medicine (Internal Medicine) Physician providers in California
There are 129 sleep medicine (internal medicine) physician records in California.
All 129 in California → Every provider in Redwood City → Sleep Medicine (Internal Medicine) Physician nationwide →
The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes
- Luis Gasca, MDRedwood City, CA 940631740920784
- Andrea Nguyen, MDRedwood City, CA 940631417698929
- Joshua Lo, DOSan Carlos, CA 940701295313880
- Mahesh Shetty, MDSunnyvale, CA 940851295954121
- Kin Yuen, MDMountain View, CA 940401881759660
- Robert Ang, MDSunnyvale, CA 940871225219025
- Vadim Kagramanov, MDSunnyvale, CA 940871396792552
- Fan Mo, DOSunnyvale, CA 940871083111405
Common questions
What is Christine Celeste Brennan, MD's NPI number?
Christine Celeste Brennan, MD's National Provider Identifier (NPI) is 1629657473, issued on Apr 7, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Christine Celeste Brennan, MD located?
The NPPES record lists a practice address at 450 Broadway St FL 2, Redwood City, CA, 94063. Phone: (507) 236-6016. Providers update this record themselves, so call before visiting.
How can I verify Christine Celeste Brennan, MD's license?
NPPES lists California license number A195905, 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 Christine Celeste Brennan, MD prescribe under Medicare Part D?
In 2024, Christine Celeste Brennan, MD had 196 Medicare Part D claims for 46 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. 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.