Mark Carey, MD
NPI 1003835422 · Nephrology Physician · Waukesha, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Carey, MD is a Nephrology Physician provider in Waukesha, WI (NPI 1003835422).
Provider details
- NPI number
- 1003835422
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 48342-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,800 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 751 | $85 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 713 | $72 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 495 | $15 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 180 | $329 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 136 | $120 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcitriol | 437 | 111 |
| Furosemide | 312 | 98 |
| Doxazosin Mesylate | 253 | 70 |
| Bumetanide | 202 | 56 |
| Allopurinol | 167 | 52 |
| Spironolactone | 164 | 58 |
| Metoprolol Succinate | 162 | 50 |
| Potassium Chloride | 154 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$194 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2020-12-22
- Certified
- 2020-12-22
Frequently asked questions
- What is Mark Carey's NPI number?
- Mark Carey's National Provider Identifier (NPI) is 1003835422, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Carey's specialty?
- Mark Carey is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Carey located?
- Mark Carey's practice location on file with NPPES is 1260 Sentry Dr Ste 140, Waukesha, WI 53186-5990.
- What is Mark Carey's phone number?
- The practice phone number listed in the NPPES registry for Mark Carey is (262) 524-1024.
- Does Mark Carey accept Medicare?
- Mark Carey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Carey's NPI active?
- Yes — Mark Carey's NPI (1003835422) is active in the NPPES registry as of the last update on 2020-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.