Fernando A. Montelongo, M.D.
Specialist · Orange, CA
Fernando A. Montelongo, M.D. is a specialist with a practice address in Orange, California, and NPI 1245321165, issued on Sep 27, 2006. Check the license (California G45460, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Fernando A. Montelongo
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G45460 CA
Self-reported in NPPES; status is on the state search - Practice location
- 932 E Chapman Ave, Orange, CA 92866
- Phone
- (714) 997-8050
- Enumerated
- Sep 27, 2006
- Record last updated
- Aug 4, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (714) 997-5075
- Medicare enrollment
- Enrolled (PECOS I20090202000383); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Verify Fernando A. Montelongo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G45460Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average specialist in 2024
3,574 Medicare Part D claims for 245 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 144 claims were for opioids.
Most prescribed
- Metformin Hcl191 claims
- Metoprolol Succinate174 claims
- Diclofenac Sodium166 claims
- Tamsulosin Hcl160 claims
- Atorvastatin Calcium158 claims
- Losartan Potassium139 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: $331.70
6 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,844 providers of this specialty with any payment received $4,760.79 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.
Fernando A. Montelongo among 5,749 specialist records in California
Fernando A. Montelongo, M.D. is one of 5,749 specialist records with a practice address in California. 30% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 60% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1979 · median 1989 among the 1,075 with a school on file
- Record last updated2015 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Orange → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Robert Dunn, M.D.Orange, CA 928661861541732
- Mario IbarraOrange, CA 928661093499733
- Shigeyuki MatsukiOrange, CA 928661679283931
- Kealani Matsumiya-Delay, CMTOrange, CA 928661912077561
- Daniel Staylor, M.A.Orange, CA 928661174868772
- Janis Fee, M.D.Orange, CA 928651891781175
- Mohammad Golshahi, M.D.Orange, CA 928671437288925
- Sohrab Salamatipour, MDOrange, CA 928671003957077
Common questions
What is Fernando A. Montelongo, M.D.'s NPI number?
Fernando A. Montelongo, M.D.'s National Provider Identifier (NPI) is 1245321165, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Fernando A. Montelongo, M.D. located?
The NPPES record lists a practice address at 932 E Chapman Ave, Orange, CA, 92866. Phone: (714) 997-8050. Providers update this record themselves, so call before visiting.
How can I verify Fernando A. Montelongo, M.D.'s license?
NPPES lists California license number G45460, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Fernando A. Montelongo, M.D. prescribe under Medicare Part D?
In 2024, Fernando A. Montelongo, M.D. had 3,574 Medicare Part D claims for 245 beneficiaries; the average among specialist prescribers was 1,380. 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.