NPPES file of Aug 9, 2026

Stephen Robert Viess, MD

Sports Medicine (Orthopaedic Surgery) Physician · Dublin, CA

Stephen Robert Viess, MD is a sports medicine (orthopaedic surgery) physician with a practice address in Dublin, California, and NPI 1770510117, issued on Jun 28, 2006. Check the license (California A71570, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1770510117
Name
Stephen Robert Viess
Credential
MD
Primary taxonomy
Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
License number
A71570 CA
Self-reported in NPPES; status is on the state search
Practice location
4000 Dublin Blvd, Dublin, CA 94568
Phone
(925) 556-7320
Enumerated
Jun 28, 2006
Record last updated
Apr 27, 2024
Fax
(925) 497-0231
Medicare enrollment
Enrolled (PECOS I20050318000905); accepts Medicare assignment
Medical or professional school
Chicago College Of Medicine And Surgery, 1998
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 4000 Dublin Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jassimran Bainiwal, MDCardiovascular Disease Physician1225532633
  2. Sonja Bauer, PTPhysical Therapist1285084772
  3. Aditya Bhargava, M.D.Sleep Medicine (Internal Medicine) Physician1114938032
  4. Deval Bhatt, M.D.Endocrinology, Diabetes & Metabolism Physician1326385659
  5. Sai Bhuvanagiri, M.D.Endocrinology, Diabetes & Metabolism Physician1134652266
  6. Lisa Biga, NPObstetrics & Gynecology Nurse Practitioner1497107890

Verify Stephen Robert Viess in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A71570
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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83% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024

49 Medicare Part D claims for 39 beneficiaries, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 22 claims were for opioids.

  1. Stephen Viess49
  2. Specialty average288

Most prescribed

  1. Hydrocodone-Acetaminophen12 claims
  2. Methylprednisolone12 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): 76.5 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.

  1. Qualityout of 100 · 30% of the final score74.3
  2. Costout of 100 · 30%44.0
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $34.96

2 payments; by number, the most common kind was food and beverage; the largest payer was Evolution Surgical, Inc. The 2,400 providers of this specialty with any payment received $19,779.31 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Stephen Viess$35
  2. Specialty average$19,779

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

One hospital affiliation

  1. Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Stephen Robert Viess among 384 sports medicine (orthopaedic surgery) physician records in California

Stephen Robert Viess, MD is one of 384 sports medicine (orthopaedic surgery) physician records with a practice address in California. 88% 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, 57% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 76% of these records are
  • Graduated1998 · median 2003 among the 293 with a school on file
  • Record last updated2024 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0005X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sports Medicine (Orthopaedic Surgery) Physician providers in California

There are 384 sports medicine (orthopaedic surgery) physician records in California.

The 8 sports medicine (orthopaedic surgery) physician records with the nearest ZIP codes

  1. Joseph Cheng, M.D.San Leandro, CA 945781871696997
  2. Brian Freeto, M.D.Napa, CA 945581962573576
  3. David Gallagher, M.D.Union City, CA 945871760697296
  4. David Bell, MDPleasanton, CA 945881619916293
  5. Ian Stine, M.D.Pleasanton, CA 945881154544468
  6. Gregg Pottorff, M.D.Castro Valley, CA 945461477520096
  7. Benjamin Busfield, MDWalnut Creek, CA 945961952459992
  8. Colin Mansfield, M.D.Walnut Creek, CA 945961275812059

Common questions

What is Stephen Robert Viess, MD's NPI number?

Stephen Robert Viess, MD's National Provider Identifier (NPI) is 1770510117, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Robert Viess, MD located?

The NPPES record lists a practice address at 4000 Dublin Blvd, Dublin, CA, 94568. Phone: (925) 556-7320. Providers update this record themselves, so call before visiting.

How can I verify Stephen Robert Viess, MD's license?

NPPES lists California license number A71570, 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 Stephen Robert Viess, MD prescribe under Medicare Part D?

In 2024, Stephen Robert Viess, MD had 49 Medicare Part D claims for 39 beneficiaries; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. Part D covers Medicare prescriptions only.

What is Stephen Robert Viess, MD's MIPS final score?

The 2023 MIPS final score is 76.5 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.