Mamdooh Gayid, MD
Internal Medicine Physician · Redlands, CA
Mamdooh Gayid, MD is an internal medicine physician with a practice address in Redlands, California, and NPI 1477554988, issued on Aug 9, 2005. Check the license (California A85467, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mamdooh Gayid
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A85467 CA
200500328 NC
Self-reported in NPPES; status is on the state search - Practice location
- 242 Cajon St, Redlands, CA 92373
- Phone
- (909) 793-3311
- Enumerated
- Aug 9, 2005
- Record last updated
- Dec 15, 2025
- Fax
- (909) 793-0241
- Medicaid ID
- 5900648 NC
- Medicare enrollment
- Enrolled (PECOS I20070221000360); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Mamdooh Gayid in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85467Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average internal medicine physician in 2024
3,504 Medicare Part D claims for 275 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 60 claims were for opioids.
Most prescribed
- Atorvastatin Calcium280 claims
- Losartan Potassium242 claims
- Rosuvastatin Calcium201 claims
- Amlodipine Besylate189 claims
- Metformin Hcl140 claims
- Levothyroxine Sodium115 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.
Bills Medicare through one group practice
- Beaver Medical Group P CRedlands, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mamdooh Gayid among 17,696 internal medicine physician records in California
Mamdooh Gayid, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 internal medicine physician records list a practice address in Redlands
They are 56 of the 2,498 NPPES records with a practice address in Redlands, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Redlands → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Charles Chen, M.D.Redlands, CA 923731124050463
- Jun Chiong, M.D., M.P.H.Redlands, CA 923731598730590
- Regan Douty, D.O.Redlands, CA 923731295766442
- Junku Kang, MDRedlands, CA 923731265474225
- Casey Kennedy, MDRedlands, CA 923731801839246
- Mohammad Osmani, MDRedlands, CA 923731568479483
- Moses Park, M.D.Redlands, CA 923731528079639
- Monroe Seiberling, M.D.Redlands, CA 923731740237783
Common questions
What is Mamdooh Gayid, MD's NPI number?
Mamdooh Gayid, MD's National Provider Identifier (NPI) is 1477554988, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mamdooh Gayid, MD located?
The NPPES record lists a practice address at 242 Cajon St, Redlands, CA, 92373. Phone: (909) 793-3311. Providers update this record themselves, so call before visiting.
How can I verify Mamdooh Gayid, MD's license?
NPPES lists California license number A85467, 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 Mamdooh Gayid, MD prescribe under Medicare Part D?
In 2024, Mamdooh Gayid, MD had 3,504 Medicare Part D claims for 275 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.