Steven L. Mack, PAC
Medical Physician Assistant · Yakima, WA
Steven L. Mack, PAC is a medical physician assistant with a practice address in Yakima, Washington, and NPI 1578550091, issued on Sep 29, 2005. Check the license (Washington 025211PA10003745, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Steven L. Mack
- Credential
- PAC
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 025211PA10003745 WA
Self-reported in NPPES; status is on the state search - Practice location
- 2500 Racquet LN, Yakima, WA 98902
- Phone
- (509) 249-3900
- Enumerated
- Sep 29, 2005
- Record last updated
- Jun 2, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (509) 573-9539
- Medicaid ID
- 8357519 WA
- Medicare enrollment
- Enrolled (PECOS I20081205000599); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 1,068 in Washington → Look up another NPI →
Also registered at 2500 Racquet LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dana Betsch, PTPhysical Therapist1457304354
- Dennis Gaskill, M.D.Urology Physician1760479281
- Dyann Kanzler, PAVMedical Physician Assistant1609962893
- Walter Lovern, M.D.Urology Physician1306833827
- Esther McCorkindale, PACMedical Physician Assistant1023005543
- Raymond Merrell, M.D.Urology Physician1861489379
Verify Steven L. Mack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license 025211PA10003745Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average medical physician assistant in 2024
598 Medicare Part D claims for 303 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Tamsulosin Hcl89 claims
- Cephalexin68 claims
- Trospium Chloride62 claims
- Methenamine Hippurate36 claims
- Sulfamethoxazole-Trimethoprim31 claims
- Oxybutynin Chloride Er29 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): 98.3 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: $238.28
6 payments; by number, the most common kind was food and beverage; the largest payer was Procept BioRobotics Corporation. The 16,165 providers of this specialty with any payment received $1,055.00 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
- Yakima Urology AT Memorial TRYakima, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven L. Mack among 1,068 medical physician assistant records in Washington
Steven L. Mack, PAC is one of 1,068 medical physician assistant records with a practice address in Washington. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated1998 · median 2013 among the 581 with a school on file
- Record last updated2016 · 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 363AM0700X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in Washington
There are 1,068 medical physician assistant records in Washington.
All 1,068 in Washington → Every provider in Yakima → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- James Charles, PA-CYakima, WA 989021235153255
- Deborah Degooyer, PA-CYakima, WA 989021134156128
- Duane Frazier, PA-CYakima, WA 989021932239308
- D. Garrett, P.A.-C.Yakima, WA 989021639222730
- Eric HohmanYakima, WA 989021801810924
- Soly Houy, PAC MMSYakima, WA 989021851318851
- Gretchen Kaizer, PA, RNYakima, WA 989021538196654
- Dyann Kanzler, PAVYakima, WA 989021609962893
Common questions
What is Steven L. Mack, PAC's NPI number?
Steven L. Mack, PAC's National Provider Identifier (NPI) is 1578550091, issued on Sep 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven L. Mack, PAC located?
The NPPES record lists a practice address at 2500 Racquet LN, Yakima, WA, 98902. Phone: (509) 249-3900. Providers update this record themselves, so call before visiting.
How can I verify Steven L. Mack, PAC's license?
NPPES lists Washington license number 025211PA10003745, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Steven L. Mack, PAC prescribe under Medicare Part D?
In 2024, Steven L. Mack, PAC had 598 Medicare Part D claims for 303 beneficiaries; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
What is Steven L. Mack, PAC's MIPS final score?
The 2023 MIPS final score is 98.3 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.