2026 NPPES data Infectious Disease Physician NPI 1003806217 MD
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RULA MAHAYNI, MD

Infectious Disease Physician in BLOOMFIELD HILLS, Michigan. 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
269
Medicare Part D claims · 56 beneficiaries · Infectious Disease Physician avg: 816
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

RULA MAHAYNI, MD filed 269 Medicare Part D claims in 2023 as a Infectious Disease Physician in BLOOMFIELD HILLS, Michigan, prescribing 81% generic.

269
Part D claims, 2023
81%
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.

RULA MAHAYNI, MD's Medicare Part D volume vs every U.S. prescriber

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

269 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 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)

RULA MAHAYNI, 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 RULA MAHAYNI, MD?

Quality data not reported

NPI registry status

Active

Issued 10/27/2005

NPI 1003806217

Primary specialty

Infectious Disease Physician

Mid-sized

8,292 US NPIs in this specialty

Medicare Part D claims

269 67% vs specialty avg

2023 prescription claims

Specialty avg: 816

Specialty distribution in Michigan

How Infectious Disease Physician compares to other specialties among Michigan providers

Michigan providers

Infectious Disease Physician share within Michigan

1. Infectious Disease Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Infectious Disease Physician share within Michigan

Specialty board-certification context

Estimated specialty board-certified rate — Infectious Disease Physician (ABMS / AOA reference)

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

Est. board-certified rate (Infectious Disease Physician) — ABMS / AOA estimate

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

RULA MAHAYNI, MD appears in the CMS NPPES registry as a Infectious Disease Physician provider holding MD credentials at 43700 WOODWARD AVE STE 103, BLOOMFIELD HILLS, MI, 48302, with a listed phone of (248) 332-4629. NPI 1003806217 was issued on 10/27/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MAHAYNI 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 269 prescription claims written by this provider, covering 56 Medicare beneficiaries and totaling roughly $200K in drug spend, split 19% brand-name and 81% 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.

Infectious Disease Physician is a mid-sized specialty nationwide, with 8,292 enrolled providers across 54 states and an average of 816 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

43700 WOODWARD AVE STE 103
BLOOMFIELD HILLS, MI 48302

Provider Details

NPI 1003806217
Specialty Infectious Disease Physician
Credentials MD
Gender Female
NPI Issued 10/27/2005

Hospital and facility affiliations

Facilities where RULA MAHAYNI, 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.

OAKLAND INFECTIOUS DISEASE ASSOCIATES PC
BLOOMFIELD HILLS, MI

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 — Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 — they are NOT specific to RULA MAHAYNI, MD. To verify RULA MAHAYNI, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases

MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

RULA MAHAYNI, MD — brand share 19.0%
Specialty average (est.)

19% brand-name claims vs 81% generic, on 269 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.

269
Total Claims
$200K
Total Drug Cost
56
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
354
Total Day Supply
8,015
Brand vs Generic
19% brand / 81% generic
Brand Drug Cost
$179K
Generic Drug Cost
$22K
Antibiotic Claims
167

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
2.45
Gender Split
54% female / 46% male

Top Prescribed Drugs (Medicare Part D)

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

What RULA MAHAYNI, 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
Cephalexin
35
Odefsey
Emtricitab/Rilpiviri/Tenof Ala
22
Vancomycin Hcl
19
Doxycycline Hyclate
15
Ciprofloxacin Hcl
14
Cefazolin Sodium
13
Biktarvy
Bictegrav/Emtricit/Tenofov Ala
12
Meropenem
12

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

Infectious Disease Physician Overview

How RULA MAHAYNI, MD fits within the Infectious Disease Physician landscape nationally.

8,292
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
816
Avg Claims per Provider

RULA MAHAYNI, MD's 269 claims are below the specialty average of 816.

Nearby Infectious Disease Physician Providers in Michigan

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

Compare Infectious Disease Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is RULA MAHAYNI, MD's specialty?
RULA MAHAYNI, MD specializes in Infectious Disease Physician and practices in BLOOMFIELD HILLS, Michigan. Credentials: MD.
How much does RULA MAHAYNI, MD prescribe under Medicare Part D?
In 2023, RULA MAHAYNI, MD wrote 269 Medicare Part D claims totaling $200K in drug costs for 56 beneficiaries.
Where is RULA MAHAYNI, MD located?
RULA MAHAYNI, MD is located at 43700 WOODWARD AVE STE 103, BLOOMFIELD HILLS, MI, 48302. Phone: (248) 332-4629.
What is RULA MAHAYNI, MD's NPI number?
RULA MAHAYNI, MD's National Provider Identifier (NPI) is 1003806217, issued on 10/27/2005.
Does RULA MAHAYNI, MD prescribe more brand-name or generic drugs?
RULA MAHAYNI, MD's prescribing is 19% brand-name and 81% generic drugs by claim count, with $179K in brand drug costs.
How many Infectious Disease Physician providers are there in the US?
There are 8,292 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 816 Medicare Part D claims per year.
What drugs does RULA MAHAYNI, MD prescribe most often?
Based on 2023 Medicare Part D data, RULA MAHAYNI, MD's most frequently prescribed drugs include Cephalexin, Odefsey, Vancomycin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RULA MAHAYNI, MD accept Medicare?
RULA MAHAYNI, MD appears in CMS Medicare data with 269 Part D claims and 56 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RULA MAHAYNI, MD's credentials?
RULA MAHAYNI, MD's NPI is 1003806217 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