2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1407353444 MD
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CHARLES LEW, MD

Geriatric Medicine (Family Medicine) Physician in TUCSON, Arizona. 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
101
Medicare Part D claims · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: CHARLES LEW, MD is a Geriatric Medicine (Family Medicine) Physician ([object Object]) practicing in TUCSON, Arizona with a Medicare Part D prescribing footprint of 101 claims — 15% brand-name prescribing .

What stands out: CHARLES LEW, MD filed 101 Medicare Part D claims in 2023 across TUCSON, Arizona. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

CHARLES LEW, 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).

CHARLES LEW, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 04/06/2018

NPI 1407353444

Primary specialty

Geriatric Medicine (Family Medicine) Physician

Niche

1,779 US NPIs in this specialty

Medicare Part D claims

101 98% vs specialty avg

2023 prescription claims

Specialty avg: 4,854

Specialty distribution in Arizona

How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Arizona providers

Arizona providers

Geriatric Medicine (Family Medicine) Physician share within Arizona

1. Geriatric Medicine (Family Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Family Medicine) Physician share within Arizona

Specialty board-certification context

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

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

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

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

CHARLES LEW, MD is a Geriatric Medicine (Family Medicine) Physician provider practicing in TUCSON, Arizona, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1407353444. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

CHARLES LEW, MD appears in the CMS NPPES registry as a Geriatric Medicine (Family Medicine) Physician provider holding MD credentials at 3601 S 6TH AVE, TUCSON, AZ, 85723, with a listed phone of (520) 792-1450. NPI 1407353444 was issued on 04/06/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEW 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 101 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $77K in drug spend, split 15% brand-name and 85% generic by claim count. 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.

Geriatric Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 1,779 enrolled providers across 52 states and an average of 4,854 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

3601 S 6TH AVE
TUCSON, AZ 85723

Provider Details

NPI 1407353444
Specialty Geriatric Medicine (Family Medicine) Physician
Credentials MD
Gender Male
NPI Issued 04/06/2018

Brand vs generic prescribing mix · Typical

CHARLES LEW, MD — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 101 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.

101
Total Claims
$77K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
101
Total Day Supply
2,481
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$75K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
87.0 years
Avg HCC Risk Score
1.80

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amlodipine Besylate
19
Lisinopril
16
Metformin Hcl
13
Atorvastatin Calcium
11
Donepezil Hcl
11

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

Geriatric Medicine (Family Medicine) Physician Overview

How CHARLES LEW, MD fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.

1,779
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider

CHARLES LEW, MD's 101 claims are below the specialty average of 4,854.

Nearby Geriatric Medicine (Family Medicine) Physician Providers in Arizona

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

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

Frequently Asked Questions

What is CHARLES LEW, MD's specialty?
CHARLES LEW, MD specializes in Geriatric Medicine (Family Medicine) Physician and practices in TUCSON, Arizona. Credentials: MD.
How much does CHARLES LEW, MD prescribe under Medicare Part D?
In 2023, CHARLES LEW, MD wrote 101 Medicare Part D claims totaling $77K in drug costs for N/A beneficiaries.
Where is CHARLES LEW, MD located?
CHARLES LEW, MD is located at 3601 S 6TH AVE, TUCSON, AZ, 85723. Phone: (520) 792-1450.
What is CHARLES LEW, MD's NPI number?
CHARLES LEW, MD's National Provider Identifier (NPI) is 1407353444, issued on 04/06/2018.
Does CHARLES LEW, MD prescribe more brand-name or generic drugs?
CHARLES LEW, MD's prescribing is 15% brand-name and 85% generic drugs by claim count, with $75K in brand drug costs.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US?
There are 1,779 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does CHARLES LEW, MD prescribe most often?
Based on 2023 Medicare Part D data, CHARLES LEW, MD's most frequently prescribed drugs include Amlodipine Besylate, Lisinopril, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES LEW, MD accept Medicare?
CHARLES LEW, MD appears in CMS Medicare data with 101 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES LEW, MD's credentials?
CHARLES LEW, MD's NPI is 1407353444 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