NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1417211509 M.D.
Verify on CMS → Cheng Zhong, M.D.
Internal Medicine Physician in Phoenix, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 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
482
Medicare Part D claims · 154 beneficiaries · Internal Medicine Physician avg: 3K
What the federal data shows
Cheng Zhong, M.D. filed 482 Medicare Part D claims in 2023 as an Internal Medicine Physician in Phoenix, Arizona.
- 482
- Part D claims, 2023
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.
Cheng Zhong, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
482 Top 38% higher than 62% of 1,370,886 prescribers
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
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Board-eligible specialty (heuristic, not verified)
Cheng Zhong, M.D. 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).
What does the federal data show about Cheng Zhong, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
482 82% vs specialty avg
Specialty distribution in Arizona
How Internal Medicine Physician compares to other specialties among Arizona 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:
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).
Cheng Zhong, M.D. appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D. credentials at 635 E BASELINE RD, Phoenix, AZ, 85042, with a listed phone of (602) 243-7277. NPI 1417211509 was issued on 07/03/2012.
Medicare Part D records for calendar year 2023 show 482 prescription claims written by this provider, covering 154 Medicare beneficiaries and totaling roughly $40K in drug spend.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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
Provider Details
| NPI | 1417211509 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/03/2012 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
482
Total Claims
$40K
Total Drug Cost
154
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 783
- Total Day Supply
- 20,949
- Generic Drug Cost
- $9K
- Antibiotic Claims
- 53
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 2.67
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 24, 65-74: 51, 75-84: 46, 85+: 33
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Cheng Zhong, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
22 claims
- Prednisone
Prednisone
22 claims
- Amlodipine Besylate
Amlodipine Besylate
17 claims
- Trelegy Ellipta
Trelegy Ellipta
15 claims
- Gabapentin
Gabapentin
14 claims
- Atorvastatin Calcium
Atorvastatin Calcium
13 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
12 claims
- Amoxicillin
Amoxicillin
11 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 22 |
| Prednisone | 22 |
| Amlodipine Besylate | 17 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 15 |
| Gabapentin | 14 |
| Atorvastatin Calcium | 13 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 12 |
| Amoxicillin | 11 |
| Atenolol | 11 |
| Fluticasone Propionate | 11 |
* 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 Cheng Zhong, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Cheng Zhong, M.D.'s 482 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Zhong.
Dr. Daniel Aaronson
MD
Tucson, AZ
Dr. Jaber Abawi
MD
Payson, AZ
Dr. Demsas Abay
MD
Peoria, AZ
Dr. Firas Abbas
M.D. M.P.H.
Mesa, AZ
Dr. Hassan Abbas
D.O.
Mesa, AZ
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 Arizona 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.
Healthcare Guides
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Medical Specialties Explained
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Frequently Asked Questions
What is Cheng Zhong, M.D.'s specialty? ▼
Cheng Zhong, M.D. specializes in Internal Medicine Physician and practices in Phoenix, Arizona. Credentials: M.D..
How much does Cheng Zhong, M.D. prescribe under Medicare Part D? ▼
In 2023, Cheng Zhong, M.D. wrote 482 Medicare Part D claims totaling $40K in drug costs for 154 beneficiaries.
Where is Cheng Zhong, M.D. located? ▼
Cheng Zhong, M.D. is located at 635 E BASELINE RD, Phoenix, AZ, 85042. Phone: (602) 243-7277.
What is Cheng Zhong, M.D.'s NPI number? ▼
Cheng Zhong, M.D.'s National Provider Identifier (NPI) is 1417211509, issued on 07/03/2012.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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 Cheng Zhong, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Cheng Zhong, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Prednisone, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cheng Zhong, M.D. accept Medicare? ▼
Cheng Zhong, M.D. appears in CMS Medicare data with 482 Part D claims and 154 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cheng Zhong, M.D.'s credentials? ▼
Cheng Zhong, M.D.'s NPI is 1417211509 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.
- 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
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.