2026 NPPES data Neurology Physician NPI 1619968179 MD
Verify on CMS →

KENNETH SASSOWER, MD

Neurology Physician in BOSTON, Massachusetts. 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 · 231 beneficiaries · Neurology Physician avg: 1K

What the federal data shows

KENNETH SASSOWER, MD filed 2,289 Medicare Part D claims in 2023 as a Neurology Physician in BOSTON, Massachusetts.

2K
Part D claims, 2023

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.

KENNETH SASSOWER, MD's Medicare Part D volume vs every U.S. prescriber

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

2,289 Top 15% higher than 85% 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

Board-eligible specialty (heuristic — not verified)

KENNETH SASSOWER, 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 KENNETH SASSOWER, MD?

Quality data not reported

NPI registry status

Active

Issued 11/03/2005

NPI 1619968179

Primary specialty

Neurology Physician

Mid-sized

19,866 US NPIs in this specialty

Medicare Part D claims

2,289 75% vs specialty avg

2023 prescription claims

Specialty avg: 1,309

Specialty distribution in Massachusetts

How Neurology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Neurology Physician share within Massachusetts

1. Neurology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Neurology Physician share within Massachusetts

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Neurology Physician) — 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).

KENNETH SASSOWER, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 15 PARKMAN ST, BOSTON, MA, 02114, with a listed phone of (617) 724-7426. NPI 1619968179 was issued on 11/03/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SASSOWER 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 2,289 prescription claims written by this provider, covering 231 Medicare beneficiaries and totaling roughly $1.9 million in drug spend, with an opioid prescribing rate of 5.8%. 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.

Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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

15 PARKMAN ST
BOSTON, MA 02114

Provider Details

NPI 1619968179
Specialty Neurology Physician
Credentials MD
Gender Male
NPI Issued 11/03/2005

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 KENNETH SASSOWER, MD. To verify KENNETH SASSOWER, 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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

2,289
Total Claims
$1.9M
Total Drug Cost
231
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,357
Total Day Supply
98,971
Generic Drug Cost
$162K
Opioid Claims
132 (5.8% rate)

Patient Demographics

Average Patient Age
65.7 years
Avg HCC Risk Score
1.28
Gender Split
56% female / 44% male
Age Distribution
<65: 70, 65-74: 89, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What KENNETH SASSOWER, MD 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
Clonazepam
158
Zolpidem Tartrate
142
Lorazepam
132
Gabapentin
129
Pregabalin
100
Pramipexole Dihydrochloride
Pramipexole Di-Hcl
78
Zaleplon
78
Zolpidem Tartrate Er
Zolpidem Tartrate
74
Ropinirole Hcl
64
Modafinil
59

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

Neurology Physician Overview

How KENNETH SASSOWER, MD fits within the Neurology Physician landscape nationally.

19,866
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider

KENNETH SASSOWER, MD's 2,289 claims are above the specialty average of 1,309.

Nearby Neurology Physician Providers in Massachusetts

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

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

Frequently Asked Questions

What is KENNETH SASSOWER, MD's specialty?
KENNETH SASSOWER, MD specializes in Neurology Physician and practices in BOSTON, Massachusetts. Credentials: MD.
How much does KENNETH SASSOWER, MD prescribe under Medicare Part D?
In 2023, KENNETH SASSOWER, MD wrote 2,289 Medicare Part D claims totaling $1.9M in drug costs for 231 beneficiaries.
Where is KENNETH SASSOWER, MD located?
KENNETH SASSOWER, MD is located at 15 PARKMAN ST, BOSTON, MA, 02114. Phone: (617) 724-7426.
What is KENNETH SASSOWER, MD's NPI number?
KENNETH SASSOWER, MD's National Provider Identifier (NPI) is 1619968179, issued on 11/03/2005.
Does KENNETH SASSOWER, MD prescribe opioids?
Yes, KENNETH SASSOWER, MD had 132 opioid claims in 2023 with an opioid prescribing rate of 5.8%.
How many Neurology Physician providers are there in the US?
There are 19,866 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does KENNETH SASSOWER, MD prescribe most often?
Based on 2023 Medicare Part D data, KENNETH SASSOWER, MD's most frequently prescribed drugs include Clonazepam, Zolpidem Tartrate, Lorazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KENNETH SASSOWER, MD accept Medicare?
KENNETH SASSOWER, MD appears in CMS Medicare data with 2,289 Part D claims and 231 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KENNETH SASSOWER, MD's credentials?
KENNETH SASSOWER, MD's NPI is 1619968179 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

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