2026 NPPES data Internal Medicine Physician NPI 1669649596 DO
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SHAHAB AHMAD, DO

Internal Medicine Physician in CORPUS CHRISTI, Texas. 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
33K
Medicare Part D claims · 686 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

SHAHAB AHMAD, DO filed 32,534 Medicare Part D claims in 2023 as a Internal Medicine Physician in CORPUS CHRISTI, Texas, prescribing 89% generic.

33K
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.

SHAHAB AHMAD, DO's Medicare Part D volume vs every U.S. prescriber

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

32,534 Top 2% higher than 98% 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. 2,000–2,200: 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)

SHAHAB AHMAD, DO 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 SHAHAB AHMAD, DO?

Quality data not reported

NPI registry status

Active

Issued 05/09/2008

NPI 1669649596

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

32,534 1098% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Texas

How Internal Medicine Physician compares to other specialties among Texas providers

Texas providers

Internal Medicine Physician share within Texas

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

Specialty board-certification context

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

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

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

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

SHAHAB AHMAD, DO appears in the CMS NPPES registry as a Internal Medicine Physician provider holding DO credentials at 2735 AIRLINE RD OFC, CORPUS CHRISTI, TX, 78414, with a listed phone of (361) 992-0816. NPI 1669649596 was issued on 05/09/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AHMAD 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 32,534 prescription claims written by this provider, covering 686 Medicare beneficiaries and totaling roughly $1.6 million in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 3.1%. 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

2735 AIRLINE RD OFC
CORPUS CHRISTI, TX 78414

Provider Details

NPI 1669649596
Specialty Internal Medicine Physician
Credentials DO
Gender Male
NPI Issued 05/09/2008

Hospital and facility affiliations

Facilities where SHAHAB AHMAD, DO 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.

NV PACS 2 LLC
CORPUS CHRISTI, TX

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 — Texas TMB 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 ~77K Texas medical licensees in 2023 — they are NOT specific to SHAHAB AHMAD, DO. To verify SHAHAB AHMAD, DO's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases

TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

SHAHAB AHMAD, DO — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 32,534 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.

32,534
Total Claims
$1.6M
Total Drug Cost
686
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
32,645
Total Day Supply
654,812
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$1.0M
Generic Drug Cost
$584K
Opioid Claims
1,005 (3.1% rate)
Antibiotic Claims
750

Patient Demographics

Average Patient Age
77.9 years
Avg HCC Risk Score
3.10
Gender Split
59% female / 41% male
Age Distribution
<65: 73, 65-74: 187, 75-84: 213, 85+: 213

Top Prescribed Drugs (Medicare Part D)

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

What SHAHAB AHMAD, DO 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
1,834
Levothyroxine Sodium
1,361
Donepezil Hcl
1,102
Furosemide
1,018
Trazodone Hcl
1,007
Amlodipine Besylate
928
Pantoprazole Sodium
816
Potassium Chloride
813
Memantine Hcl
800
Gabapentin
788

* 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 SHAHAB AHMAD, DO 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

SHAHAB AHMAD, DO's 32,534 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Texas

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

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

Frequently Asked Questions

What is SHAHAB AHMAD, DO's specialty?
SHAHAB AHMAD, DO specializes in Internal Medicine Physician and practices in CORPUS CHRISTI, Texas. Credentials: DO.
How much does SHAHAB AHMAD, DO prescribe under Medicare Part D?
In 2023, SHAHAB AHMAD, DO wrote 32,534 Medicare Part D claims totaling $1.6M in drug costs for 686 beneficiaries.
Where is SHAHAB AHMAD, DO located?
SHAHAB AHMAD, DO is located at 2735 AIRLINE RD OFC, CORPUS CHRISTI, TX, 78414. Phone: (361) 992-0816.
What is SHAHAB AHMAD, DO's NPI number?
SHAHAB AHMAD, DO's National Provider Identifier (NPI) is 1669649596, issued on 05/09/2008.
Does SHAHAB AHMAD, DO prescribe more brand-name or generic drugs?
SHAHAB AHMAD, DO's prescribing is 11% brand-name and 89% generic drugs by claim count, with $1.0M in brand drug costs.
Does SHAHAB AHMAD, DO prescribe opioids?
Yes, SHAHAB AHMAD, DO had 1,005 opioid claims in 2023 with an opioid prescribing rate of 3.1%.
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 SHAHAB AHMAD, DO prescribe most often?
Based on 2023 Medicare Part D data, SHAHAB AHMAD, DO's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Donepezil Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SHAHAB AHMAD, DO accept Medicare?
SHAHAB AHMAD, DO appears in CMS Medicare data with 32,534 Part D claims and 686 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SHAHAB AHMAD, DO's credentials?
SHAHAB AHMAD, DO's NPI is 1669649596 with credentials DO. 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