Steven C. Bast, MD
Orthopaedic Surgery Physician · Pomona, CA
Steven C. Bast, MD is an orthopaedic surgery physician with a practice address in Pomona, California, and NPI 1659348621, issued on Mar 8, 2006. Check the license (California A055098, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven C. Bast
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- A055098 CA
A55098 CA
Self-reported in NPPES; status is on the state search - Practice location
- 255 E Bonita Ave Ste 101, Pomona, CA 91767
- Phone
- (909) 593-7437
- Enumerated
- Mar 8, 2006
- Record last updated
- Sep 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (909) 593-0318
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 255 E Bonita Ave Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sean Balkcom, PA-CPhysician Assistant1831647387
- Luis Corrales, MDOrthopaedic Surgery Physician1770807265
- Nayeli Diane De La PazPhysician Assistant1770127375
- Jesus FajardoOrthopaedic Surgery Physician1003236845
- Benjamin Kamel, DPMFoot & Ankle Surgery Podiatrist1396192712
- James Lilley, M.D.Orthopaedic Surgery Physician1982642153
Verify Steven C. Bast in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A055098Check 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 orthopaedic surgery physician in 2024
34 Medicare Part D claims for 16 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin17 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: $164.76
3 payments; by number, the most common kind was food and beverage; the largest payer was Miach Orthopaedics, Inc. 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.
Steven C. Bast among 2,276 orthopaedic surgery physician records in California
Steven C. Bast, MD 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2020 · 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 Pomona → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Christopher Chalian, M.D.Pomona, CA 917671235183484
- Albert Chong, MDPomona, CA 917671700819653
- Luis Corrales, MDPomona, CA 917671770807265
- Raja Dhalla, MDPomona, CA 917671730157876
- Jesus FajardoPomona, CA 917671003236845
- Neeraj Gupta, MDPomona, CA 917671457329732
- William Hale, M.D.Pomona, CA 917671578666491
- Gregory Lercel, MDPomona, CA 917671942232723
Common questions
What is Steven C. Bast, MD's NPI number?
Steven C. Bast, MD's National Provider Identifier (NPI) is 1659348621, issued on Mar 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven C. Bast, MD located?
The NPPES record lists a practice address at 255 E Bonita Ave Ste 101, Pomona, CA, 91767. Phone: (909) 593-7437. Providers update this record themselves, so call before visiting.
How can I verify Steven C. Bast, MD's license?
NPPES lists California license number A055098, 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 Steven C. Bast, MD prescribe under Medicare Part D?
In 2024, Steven C. Bast, MD had 34 Medicare Part D claims for 16 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.