Maximo Christian Diamond, M.D.
Internal Medicine Physician · Orange, CA
Maximo Christian Diamond, M.D. is an internal medicine physician with a practice address in Orange, California, and NPI 1063519932, issued on Sep 20, 2006. Check the license (California G74989, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Maximo Christian Diamond
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G74989 CA
Self-reported in NPPES; status is on the state search - Practice location
- 600 City Parkway West, Orange, CA 92868
- Phone
- (714) 221-5182
- Enumerated
- Sep 20, 2006
- Record last updated
- Mar 27, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (714) 244-4533
- Medicare enrollment
- Enrolled (PECOS I20120612000371); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Maximo Christian Diamond in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G74989Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,255 Medicare Part D claims for 228 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Levothyroxine Sodium83 claims
- Tamsulosin Hcl74 claims
- Eliquis69 claims
- Metformin Hcl60 claims
- Losartan Potassium46 claims
- Amlodipine Besylate32 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
- Supportive Wound Care IncUpland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maximo Christian Diamond among 17,696 internal medicine physician records in California
Maximo Christian Diamond, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1991 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 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).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Orange → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jane Abdelhadi, M.D.Orange, CA 928681124097100
- Edwin Alexander, M.D.Orange, CA 928681659315752
- Romilla Batra, MDOrange, CA 928681871545038
- Ronald Daoud, M.D.Orange, CA 928681093732992
- Nadia Elihu, M.D.Orange, CA 928681659340156
- Roy Herndon, M.D.Orange, CA 928681417928383
- Deepti Pandita, MDOrange, CA 928681255358727
- Maryam Rahimi, MDOrange, CA 928681043268949
Common questions
What is Maximo Christian Diamond, M.D.'s NPI number?
Maximo Christian Diamond, M.D.'s National Provider Identifier (NPI) is 1063519932, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Maximo Christian Diamond, M.D. located?
The NPPES record lists a practice address at 600 City Parkway West, Orange, CA, 92868. Phone: (714) 221-5182. Providers update this record themselves, so call before visiting.
How can I verify Maximo Christian Diamond, M.D.'s license?
NPPES lists California license number G74989, 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 Maximo Christian Diamond, M.D. prescribe under Medicare Part D?
In 2024, Maximo Christian Diamond, M.D. had 1,255 Medicare Part D claims for 228 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.