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2026 NPPES data Family Medicine Physician NPI 1871858399 M.D.
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Marianna Kong, M.D.

Family Medicine Physician in San Francisco, California.

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
937
Medicare Part D claims · 80 beneficiaries · Family Medicine Physician avg: 3K
MIPS score
90.3/100
▲ 7 pts above national avg 83.5 · Exceptional
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Marianna Kong, M.D. reported a CMS MIPS final score of 90.3/100 - above the 83.5 national average - and filed 937 Medicare Part D claims in 2023.

90.3/100
MIPS score · +7 vs avg
937
Part D claims, 2023
Likely
board-certified (heuristic)
≥58th
pct among measured MIPS (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.

CMS NPPES provider registry desk

NPI 1871858399 · Family Medicine Physician

NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ABOVE · RX-LIGHT · BOOK-MID · PHOTO-FINISH

  • NPI-10 1871858399
  • ENUM-MID 2012
  • TAX-MEGA 148K Family Medicine
  • MIPS-ABOVE 90.3/100
  • RX-LIGHT 937
  • BOOK-MID 15,933 in California
  • PHOTO-FINISH Emily Boden · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Marianna Kong, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

90 ≥ 58th percentile 58% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Marianna Kong, M.D. sits

This provider among family medicine physician peers

Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Marianna Kong, M.D. writes more Part D claims than 33% of them and scores higher on MIPS quality than 58% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 35Marianna Kong, M.D., Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 58
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 Marianna Kong, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Marianna Kong, 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 Marianna Kong, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 07/10/2012

NPI 1871858399

Primary specialty

Family Medicine Physician

High-volume

147,760 US NPIs in this specialty

Medicare Part D claims

937 73% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

MIPS final score

90.3/100 6.8 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in California

How Family Medicine Physician compares to other specialties among California providers

California providers
Behavior Technician17.3%Marriage & Family Therapist5.5%Student in an Organized Heal…5%Mental Health Counselor3.9%Pharmacist3.5%Clinical Social Worker3.1%Family Medicine Physician1.7%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Marianna Kong, M.D.'s 2023 MIPS final score plotted against the Family Medicine Physician national average

High performer (top quartile)
MIPS Final Score
90.3/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%90.3%
MIPS final score (Family Medicine Physician) - 90.3/100 vs national avg 83.5
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

1525 SILVER AVE
San Francisco, CA 94134
(415) 657-1751

Provider Details

NPI 1871858399
Specialty Family Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 07/10/2012

CMS Quality Score (MIPS)

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

90.2542
Final Score
Measured-score avg: 83.5
70.0332
Quality
81.6475
Cost
99
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Marianna Kong, 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.

City And County OF San Francisco
San Francisco, CA

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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Marianna Kong, M.D.. To verify Marianna Kong, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC 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 California 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.

937
Total Claims
$226K
Total Drug Cost
80
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,196
Total Day Supply
64,076
Generic Drug Cost
$37K
Opioid Claims
32 (3.4% rate)

Patient Demographics

Average Patient Age
71.6 years
Avg HCC Risk Score
1.00
Gender Split
63% female / 38% male

Top Prescribed Drugs (Medicare Part D)

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

What Marianna Kong, 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
Atorvastatin Calcium
 78
Losartan Potassium
 63
Amlodipine Besylate
 52
Metoprolol Succinate
 40
Metformin Hcl
 28
Tamsulosin Hcl
 28
Naproxen
 25
Famotidine
 21
Pantoprazole Sodium
 21
Hydrocortisone
 19

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

More Family Medicine Physician in CA → All providers in California → Compare specialties →

Family Medicine Physician Overview

How Marianna Kong, M.D. 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

Marianna Kong, M.D.'s 937 claims are below the specialty average of 3,418.

Nationwide Family Medicine Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Kong, both outside California so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (90.3 here).

David English 90.3 NY Yakira Teitel 90.3 NY Ashley Gross 90.3 AR Emily Boden 90.3 SD

Same NPPES enumeration year (2012)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Brittney Congdon Rock Hill, SC Derrick Kuntz Rapid City, SD Ryan Eichhorn Hendersonville, NC Kembukem Amadi Fort Myers, FL

Nearby Family Medicine Physician Providers in California

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

One of 15,933 Family Medicine Physician providers enrolled in California, 5 are shown here.

Dr. Omer Aba-Omer
MD
Santa Monica, CA
Dr. Michelle Ababa
MD
Wilmington, CA
Dr. Anna Tzeitel Abalos
MD
Roseville, CA
Dr. Adan Abarca
MD
Anaheim, CA
Dr. Lorraine Abate
M.D.
Sacramento, CA

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Marianna Kong, M.D.'s specialty? ▼
Marianna Kong, M.D. specializes in Family Medicine Physician and practices in San Francisco, California. Credentials: M.D..
How much does Marianna Kong, M.D. prescribe under Medicare Part D? ▼
In 2023, Marianna Kong, M.D. wrote 937 Medicare Part D claims totaling $226K in drug costs for 80 beneficiaries.
What is Marianna Kong, M.D.'s Medicare quality score? ▼
Marianna Kong, M.D. has a CMS MIPS Final Score of 90.3/100 (Quality: 70, Cost: 81.6). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Marianna Kong, M.D. located? ▼
Marianna Kong, M.D. is located at 1525 SILVER AVE, San Francisco, CA, 94134. Phone: (415) 657-1751.
What is Marianna Kong, M.D.'s NPI number? ▼
Marianna Kong, M.D.'s National Provider Identifier (NPI) is 1871858399, issued on 07/10/2012.
Does Marianna Kong, M.D. prescribe opioids? ▼
Yes, Marianna Kong, M.D. had 32 opioid claims in 2023 with an opioid prescribing rate of 3.4%.
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 Marianna Kong, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Marianna Kong, M.D.'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 Marianna Kong, M.D. accept Medicare? ▼
Marianna Kong, M.D. appears in CMS Medicare data with 937 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marianna Kong, M.D.'s credentials? ▼
Marianna Kong, M.D.'s NPI is 1871858399 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

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 editorial process.

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.