NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1215913447 D.O.
Verify on CMS → William Baker, D.O.
Family Medicine Physician in Las Cruces, New Mexico.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine 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
10K
Medicare Part D claims · 609 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
89.3/100
▲ 6 pts above national avg 83.1 · Exceptional
Industry payments
$109.85
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Baker, D.O. reported a CMS MIPS final score of 89.3/100 - above the 83.1 national average - and filed 9,579 Medicare Part D claims in 2023.
- 89.3/100
- MIPS score · +6 vs avg
- 10K
- Part D claims, 2023
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
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 Baker, D.O.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
89 Top 42% higher than 58% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where William Baker, D.O. sits
This provider among family medicine physician peers
Across the 22,040 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Baker, D.O. writes more Part D claims than 87% of them and scores higher on MIPS quality than 56% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is William Baker, D.O.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Baker, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 William Baker, D.O.?
High performer (top quartile)Primary specialty
Family Medicine Physician
Medicare Part D claims
9,579 180% vs specialty avg
MIPS final score
89.3/100 6.2 pts vs avg
Specialty distribution in New Mexico
How Family Medicine Physician compares to other specialties among New Mexico providers
Medicare quality performance, MIPS
William Baker, D.O.'s 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 89.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Family Medicine Physician) - 89.3/100 vs national avg 83.1
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).
William Baker, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 2020 S SOLANO DR, Las Cruces, NM, 88001, with a listed phone of (505) 522-7313. NPI 1215913447 was issued on 12/20/2005.
Medicare Part D records for calendar year 2023 show 9,579 prescription claims written by this provider, covering 609 Medicare beneficiaries and totaling roughly $987K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 2.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 89.3/100 for the 2023 performance year (Quality 78.6), compared with the national average of 83.1.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 enrolled providers across 56 states and an average of 3,418 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
Provider Details
| NPI | 1215913447 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 12/20/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.2805
Final Score
Avg: 83.1
78.5609
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where William Baker, D.O. 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.
Las Cruces Physician Services LLC
Las Cruces, NM
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 Baker, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$110
Largest payer
AstraZeneca Pharmaceuticals LP
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 · Typical
William Baker, D.O. - brand share 13.0%
Family Medicine Physician average
13% brand-name claims vs 87% generic, on 9,579 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.
9,579
Total Claims
$987K
Total Drug Cost
609
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 22,110
- Total Day Supply
- 640,301
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $787K
- Generic Drug Cost
- $198K
- Opioid Claims
- 205 (2.1% rate)
- Antibiotic Claims
- 445
Patient Demographics
- Average Patient Age
- 74.8 years
- Avg HCC Risk Score
- 0.95
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 19, 65-74: 284, 75-84: 246, 85+: 60
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Baker, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
588 claims
- Metformin Hcl
Metformin Hcl
314 claims
- Simvastatin
Simvastatin
307 claims
- Losartan Potassium
Losartan Potassium
291 claims
- Atorvastatin Calcium
Atorvastatin Calcium
264 claims
- Amlodipine Besylate
Amlodipine Besylate
259 claims
- Hydrochlorothiazide
Hydrochlorothiazide
259 claims
- Tamsulosin Hcl
Tamsulosin Hcl
245 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 588 |
| Metformin Hcl | 314 |
| Simvastatin | 307 |
| Losartan Potassium | 291 |
| Atorvastatin Calcium | 264 |
| Amlodipine Besylate | 259 |
| Hydrochlorothiazide | 259 |
| Tamsulosin Hcl | 245 |
| Lisinopril | 238 |
| Rosuvastatin Calcium | 216 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How William Baker, D.O. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
William Baker, D.O.'s 9,579 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in New Mexico
Other clinicians with the same primary specialty enrolled in New Mexico, drawn from the same CMS NPPES roster as Baker.
Dr. Denise Aamodt
MD
Rio Rancho, NM
Dr. Jorge Abalos
DO
Artesia, NM
Dr. Holly Abernethy
M.D.
Farmington, NM
Dr. Sarah Abla
DO
Albuquerque, NM
Dr. Mustapha Abouda
MD
Espanola, NM
Compare Family Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the New Mexico medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is William Baker, D.O.'s specialty? ▼
William Baker, D.O. specializes in Family Medicine Physician and practices in Las Cruces, New Mexico. Credentials: D.O..
How much does William Baker, D.O. prescribe under Medicare Part D? ▼
In 2023, William Baker, D.O. wrote 9,579 Medicare Part D claims totaling $987K in drug costs for 609 beneficiaries.
What is William Baker, D.O.'s Medicare quality score? ▼
William Baker, D.O. has a CMS MIPS Final Score of 89.3/100 (Quality: 78.6). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Baker, D.O. located? ▼
William Baker, D.O. is located at 2020 S SOLANO DR, Las Cruces, NM, 88001. Phone: (505) 522-7313.
What is William Baker, D.O.'s NPI number? ▼
William Baker, D.O.'s National Provider Identifier (NPI) is 1215913447, issued on 12/20/2005.
Does William Baker, D.O. prescribe more brand-name or generic drugs? ▼
William Baker, D.O.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $787K in brand drug costs.
Does William Baker, D.O. prescribe opioids? ▼
Yes, William Baker, D.O. had 205 opioid claims in 2023 with an opioid prescribing rate of 2.1%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does William Baker, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Baker, D.O.'s most frequently prescribed drugs include Levothyroxine Sodium, Metformin Hcl, Simvastatin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Baker, D.O. accept Medicare? ▼
William Baker, D.O. appears in CMS Medicare data with 9,579 Part D claims and 609 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Baker, D.O.'s credentials? ▼
William Baker, D.O.'s NPI is 1215913447 with credentials D.O.. 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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.