Mary Fredenberg, MD
NPI 1134140999 · Dermatology Physician · Peoria, AZ
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Fredenberg, MD is a Dermatology Physician provider in Peoria, AZ (NPI 1134140999).
Provider details
- NPI number
- 1134140999
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 16095 (AZ)
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
5,111 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,764 | $7 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,243 | $92 |
| Destruction of Skin Growth, 1-14 Growths17110 | 928 | $113 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 695 | $46 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 135 | $131 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Minoxidil | 136 | 49 |
| Triamcinolone Acetonide | 134 | 90 |
| Clotrimazole/Betamethasone Dipbrand: Clotrimazole-Betamethasone | 71 | 51 |
| Clobetasol Propionate | 65 | 39 |
| Valacyclovir Hclbrand: Valacyclovir | 40 | 25 |
| Metronidazole | 39 | 24 |
| Betamethasone Dipropionate | 33 | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,373 across 61 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
- 2006-07-21
- Last updated
- 2008-08-13
Frequently asked questions
- What is Mary Fredenberg's NPI number?
- Mary Fredenberg's National Provider Identifier (NPI) is 1134140999, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Fredenberg's specialty?
- Mary Fredenberg is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Fredenberg located?
- Mary Fredenberg's practice location on file with NPPES is 14155 N 83rd Ave, Peoria, AZ 85381-5639.
- What is Mary Fredenberg's phone number?
- The practice phone number listed in the NPPES registry for Mary Fredenberg is (623) 215-0911.
- Does Mary Fredenberg accept Medicare?
- Mary Fredenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Fredenberg's NPI active?
- Yes — Mary Fredenberg's NPI (1134140999) is active in the NPPES registry as of the last update on 2008-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.