Tom-Oliver Klein, MD
Internal Medicine Physician · Chula Vista, CA
Tom-Oliver Klein, MD is an internal medicine physician with a practice address in Chula Vista, California, and NPI 1235161787, issued on Jul 7, 2006. Check the license (California C53959, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tom-Oliver Klein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C53959 CA
Self-reported in NPPES; status is on the state search - Practice location
- 525 3RD Ave, Chula Vista, CA 91910
- Phone
- (619) 499-2600
- Enumerated
- Jul 7, 2006
- Record last updated
- Jun 24, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (619) 585-4353
- Medicaid ID
- 47761 NM
- Medicare enrollment
- Enrolled (PECOS I20180531000782); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 525 3RD Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Arthur Corpus, P.A.Physician Assistant1366451627
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Verify Tom-Oliver Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C53959Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
323 Medicare Part D claims for 179 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium24 claims
- Cefdinir22 claims
- Pantoprazole Sodium20 claims
- Ciprofloxacin Hcl19 claims
- Amoxicillin-Clavulanate Potass18 claims
- Metoprolol Succinate13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $121.72
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Inpatient Medicine Services LLCKailua, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tom-Oliver Klein among 17,696 internal medicine physician records in California
Tom-Oliver Klein, 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 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
- Graduated2000 · median 2004 among the 11,065 with a school on file
- Record last updated2013 · 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).
81 internal medicine physician records list a practice address in Chula Vista
They are 81 of the 5,329 NPPES records with a practice address in Chula Vista, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Chula Vista → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andres BustamanteChula Vista, CA 919101720199227
- Michael Chambers, M.D.Chula Vista, CA 919101740298843
- Rocio Flores, MDChula Vista, CA 919101881607067
- Hector Heredia-Martinez, M.D.Chula Vista, CA 919101699882365
- Alejandro Hinojosa-Valencia, MDChula Vista, CA 919101083701411
- Perry Montoya, M.DChula Vista, CA 919101003826256
- Taikeun Park, MDChula Vista, CA 919101831175918
- Jose Pena, MDChula Vista, CA 919101437170008
Common questions
What is Tom-Oliver Klein, MD's NPI number?
Tom-Oliver Klein, MD's National Provider Identifier (NPI) is 1235161787, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tom-Oliver Klein, MD located?
The NPPES record lists a practice address at 525 3RD Ave, Chula Vista, CA, 91910. Phone: (619) 499-2600. Providers update this record themselves, so call before visiting.
How can I verify Tom-Oliver Klein, MD's license?
NPPES lists California license number C53959, 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 Tom-Oliver Klein, MD prescribe under Medicare Part D?
In 2024, Tom-Oliver Klein, MD had 323 Medicare Part D claims for 179 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Tom-Oliver Klein, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.