2026 NPPES data Family Medicine Physician NPI 1891215851 MD
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RACHEL BAK, MD

Family Medicine Physician in HERNDON, Virginia. 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
889
Medicare Part D claims · 162 beneficiaries · Family Medicine Physician avg: 3K

What the federal data shows

RACHEL BAK, MD filed 889 Medicare Part D claims in 2023 as a Family Medicine Physician in HERNDON, Virginia.

889
Part D claims, 2023
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.

RACHEL BAK, MD's Medicare Part D volume vs every U.S. prescriber

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

889 Top 27% higher than 73% 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%). This entry sits in this band. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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 certification likely (heuristic — not verified)

RACHEL BAK, 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 RACHEL BAK, MD?

Quality data not reported

NPI registry status

Active

Issued 06/21/2017

NPI 1891215851

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

889 74% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Virginia

How Family Medicine Physician compares to other specialties among Virginia providers

Virginia providers

Family Medicine Physician share within Virginia

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Family Medicine 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).

RACHEL BAK, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 381 ELDEN ST SUITE 1000, HERNDON, VA, 20170, with a listed phone of (703) 481-1505. NPI 1891215851 was issued on 06/21/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BAK 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 889 prescription claims written by this provider, covering 162 Medicare beneficiaries and totaling roughly $133K in drug spend. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

381 ELDEN ST SUITE 1000
HERNDON, VA 20170

Provider Details

NPI 1891215851
Specialty Family Medicine Physician
Credentials MD
Gender Female
NPI Issued 06/21/2017

Hospital and facility affiliations

Facilities where RACHEL BAK, 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.

FAIRFAX FAMILY PRACTICE CENTERS PC
HERNDON, VA
INOVA PHYSICIAN PARTNERS LLC
FAIRFAX, VA
LEGACY HEALTHCARE SERVICES INC
BURKE, VA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

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

889
Total Claims
$133K
Total Drug Cost
162
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,196
Total Day Supply
63,975
Generic Drug Cost
$19K
Antibiotic Claims
29

Patient Demographics

Average Patient Age
70.9 years
Avg HCC Risk Score
0.90
Gender Split
58% female / 42% male

Top Prescribed Drugs (Medicare Part D)

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

What RACHEL BAK, 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
Atorvastatin Calcium
87
Levothyroxine Sodium
44
Lisinopril
34
Losartan Potassium
30
Amlodipine Besylate
28
Rosuvastatin Calcium
28
Metformin Hcl
23
Alprazolam
19
Tamsulosin Hcl
19
Zolpidem Tartrate
19

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

Family Medicine Physician Overview

How RACHEL BAK, MD fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

RACHEL BAK, MD's 889 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Virginia

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

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

Frequently Asked Questions

What is RACHEL BAK, MD's specialty?
RACHEL BAK, MD specializes in Family Medicine Physician and practices in HERNDON, Virginia. Credentials: MD.
How much does RACHEL BAK, MD prescribe under Medicare Part D?
In 2023, RACHEL BAK, MD wrote 889 Medicare Part D claims totaling $133K in drug costs for 162 beneficiaries.
Where is RACHEL BAK, MD located?
RACHEL BAK, MD is located at 381 ELDEN ST SUITE 1000, HERNDON, VA, 20170. Phone: (703) 481-1505.
What is RACHEL BAK, MD's NPI number?
RACHEL BAK, MD's National Provider Identifier (NPI) is 1891215851, issued on 06/21/2017.
How many Family Medicine Physician providers are there in the US?
There are 147,640 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 RACHEL BAK, MD prescribe most often?
Based on 2023 Medicare Part D data, RACHEL BAK, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RACHEL BAK, MD accept Medicare?
RACHEL BAK, MD appears in CMS Medicare data with 889 Part D claims and 162 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RACHEL BAK, MD's credentials?
RACHEL BAK, MD's NPI is 1891215851 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