2026 NPPES data Internal Medicine Physician NPI 1235301003 MD
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Ngoc Doan, MD

Internal Medicine Physician in Atlanta, Georgia. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in Internal 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 · 301 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$228.52
12 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Ngoc Doan, MD filed 2,834 Medicare Part D claims in 2023 as a Internal Medicine Physician in Atlanta, Georgia, prescribing 89% generic.

3K
Part D claims, 2023
89%
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.

Ngoc Doan, MD's Medicare Part D volume vs every U.S. prescriber

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

2,834 Top 12% higher than 88% 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. 2K+: 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 certification likely (heuristic, not verified)

Ngoc Doan, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Ngoc Doan, MD?

Quality data not reported

NPI registry status

Active

Issued 04/01/2008

NPI 1235301003

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

2,834 4% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Georgia

How Internal Medicine Physician compares to other specialties among Georgia providers

Georgia providers
Behavior Technician - 7.3%Behavior Technician7.3%Pharmacist - 5.1%Pharmacist5.1%Student in an Organized Health Care Education/Training Program - 5%Student in an Organized Health Care Education/Training Program5%Family Nurse Practitioner - 4.8%Family Nurse Practitioner4.8%Physical Therapist - 3.9%Physical Therapist3.9%Professional Counselor - 3.6%Professional Counselor3.6%Internal Medicine Physician - 2.8%Internal Medicine Physician2.8%
Largest specialties in Georgia (% of in-state 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 Internal Medicine Physician. Verify directly:

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).

Ngoc Doan, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 5670 PEACHTREE DUNWOODY RD, Atlanta, GA, 30342, with a listed phone of (404) 255-9100. NPI 1235301003 was issued on 04/01/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Doan 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 2,834 prescription claims written by this provider, covering 301 Medicare beneficiaries and totaling roughly $174K in drug spend, split 10% brand-name and 89% generic by claim count, with an opioid prescribing rate of 0.7%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

5670 PEACHTREE DUNWOODY RD
Atlanta, GA 30342

Provider Details

NPI 1235301003
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 04/01/2008

Hospital and facility affiliations

Facilities where Ngoc Doan, 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.

Northside Primary Care Professional Services,llc
Suwanee, GA

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 Ngoc Doan, MD. Source: openpaymentsdata.cms.gov.

Total received

$229

Largest payer

Novo Nordisk 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 · Typical

Ngoc Doan, MD - brand share 10.0%
Internal Medicine Physician average

10% brand-name claims vs 89% generic, on 2,834 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.

2,834
Total Claims
$174K
Total Drug Cost
301
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,953
Total Day Supply
203,464
Brand vs Generic
10% brand / 89% generic
Brand Drug Cost
$112K
Generic Drug Cost
$61K
Opioid Claims
19 (0.7% rate)
Antibiotic Claims
46

Patient Demographics

Average Patient Age
72.4 years
Avg HCC Risk Score
1.03
Gender Split
79% female / 21% male
Age Distribution
<65: 19, 65-74: 167, 75-84: 100, 85+: 15

Top Prescribed Drugs (Medicare Part D)

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

What Ngoc Doan, 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
321
Amlodipine Besylate
199
Levothyroxine Sodium
130
Losartan Potassium
93
Lisinopril
92
Rosuvastatin Calcium
68
Zolpidem Tartrate
61
Omeprazole
60
Escitalopram Oxalate
57
Hydrochlorothiazide
53

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

Internal Medicine Physician Overview

How Ngoc Doan, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

Ngoc Doan, MD's 2,834 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Georgia

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

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Georgia medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Internal Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Ngoc Doan, MD's specialty?
Ngoc Doan, MD specializes in Internal Medicine Physician and practices in Atlanta, Georgia. Credentials: MD.
How much does Ngoc Doan, MD prescribe under Medicare Part D?
In 2023, Ngoc Doan, MD wrote 2,834 Medicare Part D claims totaling $174K in drug costs for 301 beneficiaries.
Where is Ngoc Doan, MD located?
Ngoc Doan, MD is located at 5670 PEACHTREE DUNWOODY RD, Atlanta, GA, 30342. Phone: (404) 255-9100.
What is Ngoc Doan, MD's NPI number?
Ngoc Doan, MD's National Provider Identifier (NPI) is 1235301003, issued on 04/01/2008.
Does Ngoc Doan, MD prescribe more brand-name or generic drugs?
Ngoc Doan, MD's prescribing is 10% brand-name and 89% generic drugs by claim count, with $112K in brand drug costs.
Does Ngoc Doan, MD prescribe opioids?
Yes, Ngoc Doan, MD had 19 opioid claims in 2023 with an opioid prescribing rate of 0.7%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Ngoc Doan, MD prescribe most often?
Based on 2023 Medicare Part D data, Ngoc Doan, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ngoc Doan, MD accept Medicare?
Ngoc Doan, MD appears in CMS Medicare data with 2,834 Part D claims and 301 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ngoc Doan, MD's credentials?
Ngoc Doan, MD's NPI is 1235301003 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

Compiled from official public sources by the PlainDoctor editorial team.