2026 NPPES data Physician Assistant NPI 1306039490 WILLIAM BLAKESLEE PA
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WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA

Physician Assistant in KALAMAZOO, Michigan. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
2K
Medicare Part D claims · 301 beneficiaries · Physician Assistant avg: 790
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$223.21
12 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA filed 2,396 Medicare Part D claims in 2023 as a Physician Assistant in KALAMAZOO, Michigan, prescribing 91% generic.

2K
Part D claims, 2023
91%
generic prescribing
$223.21
industry payments (Sunshine Act)

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.

WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,396 Top 14% higher than 86% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA?

Quality data not reported

NPI registry status

Active

Issued 08/22/2007

NPI 1306039490

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

2,396 203% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Michigan

How Physician Assistant compares to other specialties among Michigan providers

Michigan providers

Physician Assistant share within Michigan

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Michigan

Specialty board-certification context

Estimated specialty board-certified rate — Physician Assistant (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Physician Assistant ABMS/AOA estimate

Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

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).

WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA appears in the CMS NPPES registry as a Physician Assistant provider holding WILLIAM BLAKESLEE PA credentials at 601 JOHN ST, KALAMAZOO, MI, 49007, with a listed phone of (269) 341-8481. NPI 1306039490 was issued on 08/22/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BLAKESLEE most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 2,396 prescription claims written by this provider, covering 301 Medicare beneficiaries and totaling roughly $255K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 52.4%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

601 JOHN ST
KALAMAZOO, MI 49007

Provider Details

NPI 1306039490
Specialty Physician Assistant
Credentials WILLIAM BLAKESLEE PA
Gender Male
NPI Issued 08/22/2007

Hospital and facility affiliations

Facilities where WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA 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.

KALAMAZOO ANESTHESIOLOGY P C
PORTAGE, MI

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 WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA. Source: openpaymentsdata.cms.gov.

Total received

$223

Largest payer

Collegium Pharmaceutical, 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.

License & disciplinary context — Michigan MI-BOM 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 — they are NOT specific to WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA. To verify WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases

MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 2,396 2023 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 2023.

2,396
Total Claims
$255K
Total Drug Cost
301
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,745
Total Day Supply
78,270
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$178K
Generic Drug Cost
$76K
Opioid Claims
1,256 (52.4% rate)

Patient Demographics

Average Patient Age
69.9 years
Avg HCC Risk Score
1.39
Gender Split
63% female / 37% male
Age Distribution
<65: 74, 65-74: 125, 75-84: 85, 85+: 17

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Gabapentin
387
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
374
Tramadol Hcl
237
Pregabalin
172
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
132
Duloxetine Hcl
108
Morphine Sulfate Er
Morphine Sulfate
88
Fentanyl
83
Methadone Hcl
81
Buprenorphine
76

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Physician Assistant Overview

How WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's 2,396 claims are above the specialty average of 790.

Nearby Physician Assistant Providers in Michigan

Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as BLAKESLEE.

Compare Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's specialty?
WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA specializes in Physician Assistant and practices in KALAMAZOO, Michigan. Credentials: WILLIAM BLAKESLEE PA.
How much does WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA prescribe under Medicare Part D?
In 2023, WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA wrote 2,396 Medicare Part D claims totaling $255K in drug costs for 301 beneficiaries.
Where is WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA located?
WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA is located at 601 JOHN ST, KALAMAZOO, MI, 49007. Phone: (269) 341-8481.
What is WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's NPI number?
WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's National Provider Identifier (NPI) is 1306039490, issued on 08/22/2007.
Does WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA prescribe more brand-name or generic drugs?
WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's prescribing is 9% brand-name and 91% generic drugs by claim count, with $178K in brand drug costs.
Does WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA prescribe opioids?
Yes, WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA had 1,256 opioid claims in 2023 with an opioid prescribing rate of 52.4%.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's most frequently prescribed drugs include Gabapentin, Hydrocodone-Acetaminophen, Tramadol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA accept Medicare?
WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA appears in CMS Medicare data with 2,396 Part D claims and 301 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's credentials?
WILLIAM BLAKESLEE, WILLIAM BLAKESLEE PA's NPI is 1306039490 with credentials WILLIAM BLAKESLEE PA. 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

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 (2023). 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 April 2026 (NPPES) / 2023 (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