NPI registry status
Active
2026 NPPES data Addiction Medicine (Preventive Medicine) Physician NPI 1790216976 MD
Verify on CMS → Adam Chamberlain, MD
Addiction Medicine (Preventive Medicine) Physician in Springfield, 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 343 in Addiction Medicine (Preventive 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
3K
Medicare Part D claims · 336 beneficiaries · Addiction Medicine (Preventive Medicine) Physician avg: 929
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Adam Chamberlain, MD filed 2,930 Medicare Part D claims in 2024 as an Addiction Medicine (Preventive Medicine) Physician in Springfield, Massachusetts, prescribing 88% generic.
- 3K
- Part D claims, 2024
- 88%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥88th
- 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 Adam Chamberlain, 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 1790216976), first enumerated 03/21/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,930 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
3 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Adam Chamberlain, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- 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 1790216976 · Addiction Medicine (Preventive Medicine) Physician
NPI-10 · ENUM-RECENT · TAX-TRACE · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1790216976
- ENUM-RECENT 2017
- TAX-TRACE 343
- RX-MID 2,930
- BOOK-THIN 32 in Massachusetts
- PHOTO-ENUM Alessia Bhargava, M.D. · 2017
Adam Chamberlain, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
2,930 ≥ 88th percentile 88% 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)
Adam Chamberlain, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Adam Chamberlain, MD?
Quality data not reportedPrimary specialty
Addiction Medicine (Preventive Medicine) Physician
Medicare Part D claims
2,930 215% vs specialty avg
Specialty distribution in Massachusetts
How Addiction Medicine (Preventive Medicine) 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 Addiction Medicine (Preventive Medicine) 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 | 1790216976 |
|---|---|
| Specialty | Addiction Medicine (Preventive Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/21/2017 |
Hospital and facility affiliations
Facilities where Adam Chamberlain, 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.
According to CMS billing records, Adam Chamberlain, MD is affiliated with 3 Medicare-billing facilities.
Baystate Medical Practices Inc
Greenfield, MA
Behavioral Health Network Inc
Springfield, MA
Valley Medical Group PC
Greenfield, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Adam Chamberlain, MD. To verify Adam Chamberlain, 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 · Typical
Adam Chamberlain, MD - brand share 11.0%
Addiction Medicine (Preventive Medicine) Physician average
11% brand-name claims vs 88% generic, on 2,930 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.
2,930
Total Claims
$321K
Total Drug Cost
336
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,280.233
- Total Day Supply
- 183,238
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $253K
- Generic Drug Cost
- $67K
- Opioid Claims
- 96 (3.3% rate)
- Antibiotic Claims
- 23
Patient Demographics
- Average Patient Age
- 69.6 years
- Avg HCC Risk Score
- 1.51
- Gender Split
- 37% female / 63% male
- Age Distribution
- <65: 77, 65-74: 146, 75-84: 85, 85+: 28
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Adam Chamberlain, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
198 claims
- Losartan Potassium
Losartan Potassium
132 claims
- Amlodipine Besylate
Amlodipine Besylate
127 claims
- Lisinopril
Lisinopril
107 claims
- Gabapentin
Gabapentin
95 claims
- Omeprazole
Omeprazole
92 claims
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
85 claims
- Hydrochlorothiazide
Hydrochlorothiazide
84 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 198 |
| Losartan Potassium | 132 |
| Amlodipine Besylate | 127 |
| Lisinopril | 107 |
| Gabapentin | 95 |
| Omeprazole | 92 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 85 |
| Hydrochlorothiazide | 84 |
| Simvastatin | 74 |
| Metformin Hcl Er Metformin Hcl | 68 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Preventive Medicine) Physician in MA →
All providers in Massachusetts →
Compare specialties →
Addiction Medicine (Preventive Medicine) Physician Overview
How Adam Chamberlain, MD fits within the Addiction Medicine (Preventive Medicine) Physician landscape nationally.
343
Addiction Medicine (Preventive Medicine) Physician Providers in US
46
States with Addiction Medicine (Preventive Medicine) Physician
929
Avg Claims per Provider
Adam Chamberlain, MD's 2,930 claims are above the specialty average of 929.
Nationwide Addiction Medicine (Preventive Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chamberlain, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Addiction Medicine (Preventive Medicine) Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Chamberlain.
One of 32 Addiction Medicine (Preventive Medicine) Physician providers enrolled in Massachusetts, 5 are shown here.
Frequently Asked Questions
What is Adam Chamberlain, MD's specialty? ▼
Adam Chamberlain, MD specializes in Addiction Medicine (Preventive Medicine) Physician and practices in Springfield, Massachusetts. Credentials: MD.
How much does Adam Chamberlain, MD prescribe under Medicare Part D? ▼
In 2024, Adam Chamberlain, MD wrote 2,930 Medicare Part D claims totaling $321K in drug costs for 336 beneficiaries.
Where is Adam Chamberlain, MD located? ▼
Adam Chamberlain, MD is located at 759 CHESTNUT ST, Springfield, MA, 01107. Phone: (413) 794-5555.
What is Adam Chamberlain, MD's NPI number? ▼
Adam Chamberlain, MD's National Provider Identifier (NPI) is 1790216976, issued on 03/21/2017.
Does Adam Chamberlain, MD prescribe more brand-name or generic drugs? ▼
Adam Chamberlain, MD's prescribing is 11% brand-name and 88% generic drugs by claim count, with $253K in brand drug costs.
Does Adam Chamberlain, MD prescribe opioids? ▼
Yes, Adam Chamberlain, MD had 96 opioid claims in 2024 with an opioid prescribing rate of 3.3%.
How many Addiction Medicine (Preventive Medicine) Physician providers are there in the US? ▼
There are 343 Addiction Medicine (Preventive Medicine) Physician providers across 46 states in the US. The average Addiction Medicine (Preventive Medicine) Physician provider writes 929 Medicare Part D claims per year.
What drugs does Adam Chamberlain, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Adam Chamberlain, MD's most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Adam Chamberlain, MD accept Medicare? ▼
Adam Chamberlain, MD appears in CMS Medicare data with 2,930 Part D claims and 336 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Adam Chamberlain, MD's credentials? ▼
Adam Chamberlain, MD's NPI is 1790216976 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.