Stephen Zerlang
Family Medicine Physician · Greeley, CO
Stephen Zerlang is a family medicine physician with a practice address in Greeley, Colorado, and NPI 1053722405, issued on May 19, 2014. Check the license (Colorado TL005133, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Stephen Zerlang
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- TL005133 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1600 23RD Ave, Greeley, CO 80634
- Phone
- (970) 346-2800
- Enumerated
- May 19, 2014
- Record last updated
- Jul 21, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (970) 346-2774
- Medicare enrollment
- Enrolled (PECOS I20171214002695); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Also registered at 1600 23RD Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephen Zerlang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license TL005133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average family medicine physician in 2024
1,514 Medicare Part D claims for 329 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 16 claims were for opioids.
Most prescribed
- Atorvastatin Calcium110 claims
- Lisinopril73 claims
- Levothyroxine Sodium65 claims
- Amlodipine Besylate62 claims
- Metformin Hcl54 claims
- Gabapentin53 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): 89 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).
Bills Medicare through 2 group practices
- Kaweah Delta Health Care DistrictTulare, CA
- Valley Hospitalist Medical Group, IncVisalia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Zerlang among 3,563 family medicine physician records in Colorado
Stephen Zerlang is one of 3,563 family medicine physician records with a practice address in Colorado. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 74% of them.
- NPI issued2014 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2014 · median 2008 among the 2,077 with a school on file
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
121 family medicine physician records list a practice address in Greeley
They are 121 of the 3,518 NPPES records with a practice address in Greeley, and 3,563 family medicine physician records in Colorado.
All 3,563 in Colorado → Every provider in Greeley → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jacqueline Bearden, M.D.Greeley, CO 806341013912930
- Richard Budensiek, D.O.Greeley, CO 806341518962448
- Jeffrey Cook, MDGreeley, CO 806341992781892
- Herbert Fahrenholtz, MDGreeley, CO 806341811986169
- Anthony Fink, MDGreeley, CO 806341235116120
- Stacey Garber, MDGreeley, CO 806341558350892
- Wayne Jeffers, MDGreeley, CO 806341952390114
- Brian Kingston, MDGreeley, CO 806341356345391
Common questions
What is Stephen Zerlang's NPI number?
Stephen Zerlang's National Provider Identifier (NPI) is 1053722405, issued on May 19, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Zerlang located?
The NPPES record lists a practice address at 1600 23RD Ave, Greeley, CO, 80634. Phone: (970) 346-2800. Providers update this record themselves, so call before visiting.
How can I verify Stephen Zerlang's license?
NPPES lists Colorado license number TL005133, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephen Zerlang prescribe under Medicare Part D?
In 2024, Stephen Zerlang had 1,514 Medicare Part D claims for 329 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Stephen Zerlang's MIPS final score?
The 2023 MIPS final score is 89 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.