Prem Narayan Ramkumar, M.D., M.B.A.
Orthopaedic Surgery Physician · Downey, CA
Prem Narayan Ramkumar, M.D., M.B.A. is an orthopaedic surgery physician with a practice address in Downey, California, and NPI 1255794889, issued on Mar 31, 2016. Check the license (California A180372, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Prem Narayan Ramkumar
- Credential
- M.D., M.B.A.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- A180372 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5750 Downey Ave Ste 308, Downey, CA 90712
- Phone
- (562) 633-3787
- Enumerated
- Mar 31, 2016
- Record last updated
- Aug 28, 2025
- Fax
- (562) 633-1977
- Medicare enrollment
- Enrolled (PECOS I20230421002417); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Verify Prem Narayan Ramkumar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A180372Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average orthopaedic surgery physician in 2024
1,034 Medicare Part D claims for 258 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 223 claims were for opioids.
Most prescribed
- Meloxicam331 claims
- Naproxen136 claims
- Tramadol Hcl114 claims
- Ondansetron Hcl99 claims
- Dexamethasone98 claims
- Hydromorphone Hcl86 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: $18,773.04
45 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 15,003 providers of this specialty with any payment received $23,022.89 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
- Commons Clinic Medical Group, PCMarina Del Rey, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Prem Narayan Ramkumar among 2,276 orthopaedic surgery physician records in California
Prem Narayan Ramkumar, M.D., M.B.A. is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 86% of them.
- NPI issued2016 · 86% of these records are older, 12% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2016 · median 2003 among the 1,347 with a school on file
- Record last updated2025 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in Downey → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Christopher Combs, M.D.Lakewood, CA 907121205925468
- Pad Krishna, MDLakewood, CA 907121669558276
- Justin Stafford, D.O.Lakewood, CA 907121215551205
- Ezzat Wassef, M.D.Lakewood, CA 907121427063197
- Andrew Wassef, M.D.Lakewood, CA 907121982848099
- Michael Hall, M.D.Harbor City, CA 907101902097959
- Duke Ahn, M.D.Los Alamitos, CA 907201942318373
- Lawrence Feiwell, M.D.Los Alamitos, CA 907201932201787
Common questions
What is Prem Narayan Ramkumar, M.D., M.B.A.'s NPI number?
Prem Narayan Ramkumar, M.D., M.B.A.'s National Provider Identifier (NPI) is 1255794889, issued on Mar 31, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Prem Narayan Ramkumar, M.D., M.B.A. located?
The NPPES record lists a practice address at 5750 Downey Ave Ste 308, Downey, CA, 90712. Phone: (562) 633-3787. Providers update this record themselves, so call before visiting.
How can I verify Prem Narayan Ramkumar, M.D., M.B.A.'s license?
NPPES lists California license number A180372, 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 Prem Narayan Ramkumar, M.D., M.B.A. prescribe under Medicare Part D?
In 2024, Prem Narayan Ramkumar, M.D., M.B.A. had 1,034 Medicare Part D claims for 258 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. 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.