NPI registry status
Active
2026 NPPES data Child & Adolescent Psychiatry Physician NPI 1639107444 MD
Verify on CMS → Peter Kowalski, MD
Child & Adolescent Psychiatry Physician in Tucson, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,300 in Child & Adolescent Psychiatry Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 109 beneficiaries · Child & Adolescent Psychiatry Physician avg: 608
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.8K
116 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Peter Kowalski, MD filed 2,260 Medicare Part D claims in 2024 as a Child & Adolescent Psychiatry Physician in Tucson, Arizona, prescribing 92% generic.
- 2K
- Part D claims, 2024
- 92%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥85th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Peter Kowalski, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1639107444), first enumerated 06/29/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,260 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$1.8K in reported industry payments (116 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1639107444 · Child & Adolescent Psychiatry Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1639107444
- ENUM-LEGACY 2006
- TAX-MID 6K Child &
- RX-MID 2,260
- BOOK-THIN 100 in Arizona
- PHOTO-ENUM David Garrison · 2006
Peter Kowalski, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
2,260 ≥ 85th percentile 85% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Peter Kowalski, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Peter Kowalski, MD?
Quality data not reportedPrimary specialty
Child & Adolescent Psychiatry Physician
Medicare Part D claims
2,260 272% vs specialty avg
Specialty distribution in Arizona
How Child & Adolescent Psychiatry Physician compares to other specialties among Arizona providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Child & Adolescent Psychiatry Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1639107444 |
|---|---|
| Specialty | Child & Adolescent Psychiatry Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/29/2006 |
Hospital and facility affiliations
Facilities where Peter Kowalski, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Banner-University Medical Group
Tucson, AZ
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Peter Kowalski, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.8K
Largest payer
Alkermes, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Peter Kowalski, MD - brand share 8.0%
Child & Adolescent Psychiatry Physician average
8% brand-name claims vs 92% generic, on 2,260 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
2,260
Total Claims
$500K
Total Drug Cost
109
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,768.767
- Total Day Supply
- 81,924
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $432K
- Generic Drug Cost
- $68K
Patient Demographics
- Average Patient Age
- 53.3 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 83, 65-74: 21, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Peter Kowalski, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Gabapentin
Gabapentin
118 claims
- Duloxetine Hcl
Duloxetine Hcl
110 claims
- Trazodone Hcl
Trazodone Hcl
90 claims
- Clozapine
Clozapine
85 claims
- Prazosin Hcl
Prazosin Hcl
77 claims
- Risperidone
Risperidone
69 claims
- Aripiprazole
Aripiprazole
65 claims
- Lamotrigine
Lamotrigine
62 claims
| Drug | Claims |
|---|---|
| Gabapentin | 118 |
| Duloxetine Hcl | 110 |
| Trazodone Hcl | 90 |
| Clozapine | 85 |
| Prazosin Hcl | 77 |
| Risperidone | 69 |
| Aripiprazole | 65 |
| Lamotrigine | 62 |
| Benztropine Mesylate | 59 |
| Quetiapine Fumarate | 58 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Child & Adolescent Psychiatry Physician in AZ →
All providers in Arizona →
Compare specialties →
Child & Adolescent Psychiatry Physician Overview
How Peter Kowalski, MD fits within the Child & Adolescent Psychiatry Physician landscape nationally.
6,300
Child & Adolescent Psychiatry Physician Providers in US
54
States with Child & Adolescent Psychiatry Physician
608
Avg Claims per Provider
Peter Kowalski, MD's 2,260 claims are above the specialty average of 608.
Nationwide Child & Adolescent Psychiatry Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kowalski, both outside Arizona so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Child & Adolescent Psychiatry Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Kowalski.
One of 100 Child & Adolescent Psychiatry Physician providers enrolled in Arizona, 5 are shown here.
Dr. Erum Ali
MD
Mesa, AZ
Dr. Houshang Aminian
MD
Phx, AZ
Dr. Mark Anderson
DO
Scottsdale, AZ
Dr. Sandra Antoniak
M.D.
Tucson, AZ
Ari Azani
Tucson, AZ
Compare Child & Adolescent Psychiatry Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Peter Kowalski, MD's specialty? ▼
Peter Kowalski, MD specializes in Child & Adolescent Psychiatry Physician and practices in Tucson, Arizona. Credentials: MD.
How much does Peter Kowalski, MD prescribe under Medicare Part D? ▼
In 2024, Peter Kowalski, MD wrote 2,260 Medicare Part D claims totaling $500K in drug costs for 109 beneficiaries.
Where is Peter Kowalski, MD located? ▼
Peter Kowalski, MD is located at 2800 E AJO WAY, Tucson, AZ, 85713. Phone: (520) 871-7500.
What is Peter Kowalski, MD's NPI number? ▼
Peter Kowalski, MD's National Provider Identifier (NPI) is 1639107444, issued on 06/29/2006.
Does Peter Kowalski, MD prescribe more brand-name or generic drugs? ▼
Peter Kowalski, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $432K in brand drug costs.
How many Child & Adolescent Psychiatry Physician providers are there in the US? ▼
There are 6,300 Child & Adolescent Psychiatry Physician providers across 54 states in the US. The average Child & Adolescent Psychiatry Physician provider writes 608 Medicare Part D claims per year.
What drugs does Peter Kowalski, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Peter Kowalski, MD's most frequently prescribed drugs include Gabapentin, Duloxetine Hcl, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Peter Kowalski, MD accept Medicare? ▼
Peter Kowalski, MD appears in CMS Medicare data with 2,260 Part D claims and 109 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Peter Kowalski, MD's credentials? ▼
Peter Kowalski, MD's NPI is 1639107444 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.