2026 NPPES data Anesthesiology Physician NPI 1649224676 M.D.
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HONGHUI FENG, M.D.

Anesthesiology Physician in OLD SAYBROOK, Connecticut. 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
681
Medicare Part D claims · 108 beneficiaries · Anesthesiology Physician avg: 860
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.0218/100
▲ 14 pts above national avg 83.1 · [object Object]
Industry payments
$850.51
13 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

HONGHUI FENG, M.D. reported a CMS MIPS final score of 97.0218/100 — above the 83.1 national average — and filed 681 Medicare Part D claims in 2023.

97.0218/100
MIPS score · +14 vs avg
681
Part D claims, 2023
91%
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.

HONGHUI FENG, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

97 Top 15% higher than 85% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

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

Board certification likely (heuristic — not verified)

HONGHUI FENG, M.D. 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 HONGHUI FENG, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 05/22/2006

NPI 1649224676

Primary specialty

Anesthesiology Physician

High-volume

56,398 US NPIs in this specialty

Medicare Part D claims

681 21% vs specialty avg

2023 prescription claims

Specialty avg: 860

MIPS final score

97.0218/100 13.921800000000005% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Connecticut

How Anesthesiology Physician compares to other specialties among Connecticut providers

Connecticut providers

Anesthesiology Physician share within Connecticut

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

Medicare quality performance — MIPS

HONGHUI FENG, M.D.'s 2023 MIPS final score plotted against the Anesthesiology Physician national average

High performer (top quartile)
MIPS Final Score
97.0218/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Anesthesiology Physician) — 97.0218/100 vs national avg 83.1

0%100%National avg83%97%
MIPS final score (Anesthesiology Physician) — 97.0218/100 vs national avg 83.1

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).

HONGHUI FENG, M.D. appears in the CMS NPPES registry as a Anesthesiology Physician provider holding M.D. credentials at 929 BOSTON POST RD STE 7, OLD SAYBROOK, CT, 06475, with a listed phone of (860) 514-2873. NPI 1649224676 was issued on 05/22/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FENG 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 681 prescription claims written by this provider, covering 108 Medicare beneficiaries and totaling roughly $44K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 39.6%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 97.0218/100 for the 2023 performance year (Quality 78.0983), compared with the national average of 83.1.

Anesthesiology Physician is a high-volume specialty nationwide, with 56,398 enrolled providers across 56 states and an average of 860 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

929 BOSTON POST RD STE 7
OLD SAYBROOK, CT 06475

Provider Details

NPI 1649224676
Specialty Anesthesiology Physician
Credentials M.D.
Gender Male
NPI Issued 05/22/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

97.0218
Final Score
Avg: 83.1
78.0983
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where HONGHUI FENG, M.D. 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.

INTEGRATED ANESTHESIA ASSOCIATES LLC
BRIDGEPORT, CT

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 HONGHUI FENG, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$851

Largest payer

Saluda Medical Americas, 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.

Brand vs generic prescribing mix · Generic-heavy

HONGHUI FENG, M.D. — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 681 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.

681
Total Claims
$44K
Total Drug Cost
108
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
735
Total Day Supply
19,788
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$28K
Generic Drug Cost
$16K
Opioid Claims
270 (39.6% rate)

Patient Demographics

Average Patient Age
75.7 years
Avg HCC Risk Score
1.70
Gender Split
67% female / 33% male

Top Prescribed Drugs (Medicare Part D)

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

What HONGHUI FENG, M.D. 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
271
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
62
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
49
Diclofenac Sodium
32
Cyclobenzaprine Hcl
29
Oxycodone Hcl
28
Buprenorphine
23
Oxycontin
Oxycodone Hcl
18
Fentanyl
13
Lidocaine
13

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

Anesthesiology Physician Overview

How HONGHUI FENG, M.D. fits within the Anesthesiology Physician landscape nationally.

56,398
Anesthesiology Physician Providers in US
56
States with Anesthesiology Physician
860
Avg Claims per Provider

HONGHUI FENG, M.D.'s 681 claims are below the specialty average of 860.

Nearby Anesthesiology Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is HONGHUI FENG, M.D.'s specialty?
HONGHUI FENG, M.D. specializes in Anesthesiology Physician and practices in OLD SAYBROOK, Connecticut. Credentials: M.D..
How much does HONGHUI FENG, M.D. prescribe under Medicare Part D?
In 2023, HONGHUI FENG, M.D. wrote 681 Medicare Part D claims totaling $44K in drug costs for 108 beneficiaries.
What is HONGHUI FENG, M.D.'s Medicare quality score?
HONGHUI FENG, M.D. has a CMS MIPS Final Score of 97.0218/100 (Quality: 78.0983). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is HONGHUI FENG, M.D. located?
HONGHUI FENG, M.D. is located at 929 BOSTON POST RD STE 7, OLD SAYBROOK, CT, 06475. Phone: (860) 514-2873.
What is HONGHUI FENG, M.D.'s NPI number?
HONGHUI FENG, M.D.'s National Provider Identifier (NPI) is 1649224676, issued on 05/22/2006.
Does HONGHUI FENG, M.D. prescribe more brand-name or generic drugs?
HONGHUI FENG, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $28K in brand drug costs.
Does HONGHUI FENG, M.D. prescribe opioids?
Yes, HONGHUI FENG, M.D. had 270 opioid claims in 2023 with an opioid prescribing rate of 39.6%.
How many Anesthesiology Physician providers are there in the US?
There are 56,398 Anesthesiology Physician providers across 56 states in the US. The average Anesthesiology Physician provider writes 860 Medicare Part D claims per year.
What drugs does HONGHUI FENG, M.D. prescribe most often?
Based on 2023 Medicare Part D data, HONGHUI FENG, M.D.'s most frequently prescribed drugs include Gabapentin, Oxycodone-Acetaminophen, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HONGHUI FENG, M.D. accept Medicare?
HONGHUI FENG, M.D. appears in CMS Medicare data with 681 Part D claims and 108 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HONGHUI FENG, M.D.'s credentials?
HONGHUI FENG, M.D.'s NPI is 1649224676 with credentials M.D.. 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.
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