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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. ANN B MERKOW M.D.
NPI 1528035383
Internal Medicine in West Allis, WI

Active since March 01, 2006PECOS Enrolled
555 S 108TH ST, WEST ALLIS, WI 53214(414) 566-6400(414) 566-3866 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Ann B Merkow M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ANN B MERKOW M.D. (NPI 1528035383) is an individual internal medicine provider in West Allis, Wisconsin, licensed in Wisconsin (27275-020) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1528035383
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. ANN B MERKOWCredential: M.D.
Location Address555 S 108TH STWest Allis, WI 53214-1100
Mailing Address555 S 108th StWest Allis, WI 53214-1100 · (414) 566-6400 · Fax (414) 566-3866
Phone(414) 566-6400
Fax(414) 566-3866
Sole ProprietorNo
Enumeration DateMarch 1, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1528035383 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 27275-020
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
555 S 108TH ST, West Allis, WI 53214
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ann B Merkow M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53214 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LISA M STUKENBERG M.D.
Pediatrics
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-6400
QUAD/MED, LLC
Clinic/Center (Multi-Specialty)
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-8210
PAUL GALLESKE
Specialist/Technologist (Athletic Trainer)
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-6400
DR. MOHAMED Z ADL DDS
Dentist (General Practice)
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-6400
ROA QATO M.D.
Obstetrics & Gynecology
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-6400
MRS. KATHY OSTERHAUS-KEGEL P.A.
Physician Assistant
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-6400
QUAD/MED, LLC
Clinic/Center (Dental)
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-3725
DR. JEFFERY A BRAUN O.D.
Optometrist
555 S 108TH ST
WEST ALLIS, WI 53214
Milwaukee County (414) 566-3803

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ann Merkow's NPI number?

The NPI number for Ann Merkow is 1528035383. It was assigned to this individual provider in the NPPES registry on March 1, 2006.

Where is Ann Merkow located?

Ann Merkow practices at 555 S 108th St, West Allis, WI 53214. The listed phone number is (414) 566-6400.

What is Ann Merkow's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Ann Merkow enrolled in Medicare?

Yes. Ann Merkow is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ann Merkow was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.