NPI registry status
Active
2026 NPPES data Child & Adolescent Psychiatry Physician NPI 1467071209 MD
Verify on CMS → William Sidelinger, MD
Child & Adolescent Psychiatry Physician in Worcester, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,160 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
405
Medicare Part D claims · 31 beneficiaries · Child & Adolescent Psychiatry Physician avg: 600
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
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 Sidelinger, MD filed 405 Medicare Part D claims in 2023 as a Child & Adolescent Psychiatry Physician in Worcester, Massachusetts, prescribing 96% generic.
- 405
- Part D claims, 2023
- 96%
- generic prescribing
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 Sidelinger, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
405 Top 38% higher than 62% of 1,370,886 prescribers
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
◑
Board-eligible specialty (heuristic, not verified)
William Sidelinger, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Sidelinger, MD?
Quality data not reportedPrimary specialty
Child & Adolescent Psychiatry Physician
Medicare Part D claims
405 32% vs specialty avg
Specialty distribution in Massachusetts
How Child & Adolescent Psychiatry Physician compares to other specialties among Massachusetts 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).
William Sidelinger, MD appears in the CMS NPPES registry as a Child & Adolescent Psychiatry Physician provider holding MD credentials at 309 BELMONT ST, Worcester, MA, 01604, with a listed phone of (508) 368-3300. NPI 1467071209 was issued on 04/12/2020.
Medicare Part D records for calendar year 2023 show 405 prescription claims written by this provider, covering 31 Medicare beneficiaries and totaling roughly $25K in drug spend, split 4% brand-name and 96% generic by claim count.
Child & Adolescent Psychiatry Physician is a mid-sized specialty nationwide, with 6,160 enrolled providers across 54 states and an average of 600 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 | 1467071209 |
|---|---|
| Specialty | Child & Adolescent Psychiatry Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/12/2020 |
License & disciplinary context - Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 - they are NOT specific to William Sidelinger, MD. To verify William Sidelinger, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
William Sidelinger, MD - brand share 4.0%
Child & Adolescent Psychiatry Physician average
4% brand-name claims vs 96% generic, on 405 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.
405
Total Claims
$25K
Total Drug Cost
31
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 517
- Total Day Supply
- 15,125
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $13K
- Generic Drug Cost
- $12K
Patient Demographics
- Average Patient Age
- 49.3 years
- Avg HCC Risk Score
- 1.72
- Gender Split
- 65% female / 35% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Sidelinger, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trazodone Hcl
Trazodone Hcl
43 claims
- Clozapine
Clozapine
37 claims
- Risperidone
Risperidone
33 claims
- Quetiapine Fumarate
Quetiapine Fumarate
24 claims
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
23 claims
- Duloxetine Hcl
Duloxetine Hcl
21 claims
- Escitalopram Oxalate
Escitalopram Oxalate
21 claims
- Gabapentin
Gabapentin
21 claims
| Drug | Claims |
|---|---|
| Trazodone Hcl | 43 |
| Clozapine | 37 |
| Risperidone | 33 |
| Quetiapine Fumarate | 24 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 23 |
| Duloxetine Hcl | 21 |
| Escitalopram Oxalate | 21 |
| Gabapentin | 21 |
| Bupropion Xl Bupropion Hcl | 20 |
| Aripiprazole | 17 |
* 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 MA →
All providers in Massachusetts →
Compare specialties →
Child & Adolescent Psychiatry Physician Overview
How William Sidelinger, MD fits within the Child & Adolescent Psychiatry Physician landscape nationally.
6,160
Child & Adolescent Psychiatry Physician Providers in US
54
States with Child & Adolescent Psychiatry Physician
600
Avg Claims per Provider
William Sidelinger, MD's 405 claims are below the specialty average of 600.
Nearby Child & Adolescent Psychiatry Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Sidelinger.
Dr. Patricia Abbott
MD
Westwood, MA
Dr. Annah Abrams
MD
Boston, MA
Dr. Ashley Adams
MD
Boston, MA
Dr. David Adams
MD
Boston, MA
Dr. Peter Adams
M.D.
Newton, MA
Compare Child & Adolescent Psychiatry 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Child & Adolescent Psychiatry 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is William Sidelinger, MD's specialty? ▼
William Sidelinger, MD specializes in Child & Adolescent Psychiatry Physician and practices in Worcester, Massachusetts. Credentials: MD.
How much does William Sidelinger, MD prescribe under Medicare Part D? ▼
In 2023, William Sidelinger, MD wrote 405 Medicare Part D claims totaling $25K in drug costs for 31 beneficiaries.
Where is William Sidelinger, MD located? ▼
William Sidelinger, MD is located at 309 BELMONT ST, Worcester, MA, 01604. Phone: (508) 368-3300.
What is William Sidelinger, MD's NPI number? ▼
William Sidelinger, MD's National Provider Identifier (NPI) is 1467071209, issued on 04/12/2020.
Does William Sidelinger, MD prescribe more brand-name or generic drugs? ▼
William Sidelinger, MD's prescribing is 4% brand-name and 96% generic drugs by claim count, with $13K in brand drug costs.
How many Child & Adolescent Psychiatry Physician providers are there in the US? ▼
There are 6,160 Child & Adolescent Psychiatry Physician providers across 54 states in the US. The average Child & Adolescent Psychiatry Physician provider writes 600 Medicare Part D claims per year.
What drugs does William Sidelinger, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Sidelinger, MD's most frequently prescribed drugs include Trazodone Hcl, Clozapine, Risperidone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Sidelinger, MD accept Medicare? ▼
William Sidelinger, MD appears in CMS Medicare data with 405 Part D claims and 31 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Sidelinger, MD's credentials? ▼
William Sidelinger, MD's NPI is 1467071209 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 (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
Compiled from official public sources by the PlainDoctor editorial team.