NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1386959989 M.D.
Verify on CMS → Serign Mass Marong, M.D.
Family Medicine Physician in Tucson, 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 147,640 in Family 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
5K
Medicare Part D claims · 614 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$121.4
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Serign Mass Marong, M.D. filed 5,196 Medicare Part D claims in 2023 as a Family Medicine Physician in Tucson, Arizona, prescribing 89% generic.
- 5K
- 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.
Serign Mass Marong, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
5,196 Top 6% higher than 94% 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
✓
Board certification likely (heuristic, not verified)
Serign Mass Marong, M.D. 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 Serign Mass Marong, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
5,196 52% vs specialty avg
Specialty distribution in Arizona
How Family 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 Family 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).
Serign Mass Marong, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 6130 N LA CHOLLA BLVD, Tucson, AZ, 85741, with a listed phone of (520) 742-4159. NPI 1386959989 was issued on 08/09/2010.
Medicare Part D records for calendar year 2023 show 5,196 prescription claims written by this provider, covering 614 Medicare beneficiaries and totaling roughly $448K in drug spend, split 10% brand-name and 89% generic by claim count, with an opioid prescribing rate of 2.5%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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 | 1386959989 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/09/2010 |
Hospital and facility affiliations
Facilities where Serign Mass Marong, M.D. 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.
Arizona Community Physicians PC
Tucson, AZ
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 Serign Mass Marong, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$121
Largest payer
Kestra Medical Technology Services, 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
Serign Mass Marong, M.D. - brand share 10.0%
Family Medicine Physician average
10% brand-name claims vs 89% generic, on 5,196 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.
5,196
Total Claims
$448K
Total Drug Cost
614
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 13,014
- Total Day Supply
- 379,792
- Brand vs Generic
- 10% brand / 89% generic
- Brand Drug Cost
- $348K
- Generic Drug Cost
- $97K
- Opioid Claims
- 128 (2.5% rate)
- Antibiotic Claims
- 92
Patient Demographics
- Average Patient Age
- 74.7 years
- Avg HCC Risk Score
- 1.04
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 23, 65-74: 299, 75-84: 229, 85+: 63
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Serign Mass Marong, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
390 claims
- Levothyroxine Sodium
Levothyroxine Sodium
305 claims
- Amlodipine Besylate
Amlodipine Besylate
253 claims
- Lisinopril
Lisinopril
203 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
182 claims
- Losartan Potassium
Losartan Potassium
175 claims
- Pravastatin Sodium 155
Pravastatin Sodium
155 claims
- Metformin Hcl 133
Metformin Hcl
133 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 390 |
| Levothyroxine Sodium | 305 |
| Amlodipine Besylate | 253 |
| Lisinopril | 203 |
| Rosuvastatin Calcium | 182 |
| Losartan Potassium | 175 |
| Pravastatin Sodium | 155 |
| Metformin Hcl | 133 |
| Simvastatin | 126 |
| Omeprazole | 113 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Serign Mass Marong, M.D. fits within the Family Medicine Physician landscape nationally.
147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Serign Mass Marong, M.D.'s 5,196 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Marong.
Dr. Muhammad Aamer
M.D.
Yuma, AZ
Dr. Ndidi Abara
M.D.
Yuma, AZ
Dr. Steven Abdelmalak
MD
Scottsdale, AZ
Dr. Lindsey Abeyta
FNP
Tucson, AZ
Dr. Modupeola Abiodun
M.D.
Chandler, AZ
Compare Family 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 Family 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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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
Telehealth Guide
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Frequently Asked Questions
What is Serign Mass Marong, M.D.'s specialty? ▼
Serign Mass Marong, M.D. specializes in Family Medicine Physician and practices in Tucson, Arizona. Credentials: M.D..
How much does Serign Mass Marong, M.D. prescribe under Medicare Part D? ▼
In 2023, Serign Mass Marong, M.D. wrote 5,196 Medicare Part D claims totaling $448K in drug costs for 614 beneficiaries.
Where is Serign Mass Marong, M.D. located? ▼
Serign Mass Marong, M.D. is located at 6130 N LA CHOLLA BLVD, Tucson, AZ, 85741. Phone: (520) 742-4159.
What is Serign Mass Marong, M.D.'s NPI number? ▼
Serign Mass Marong, M.D.'s National Provider Identifier (NPI) is 1386959989, issued on 08/09/2010.
Does Serign Mass Marong, M.D. prescribe more brand-name or generic drugs? ▼
Serign Mass Marong, M.D.'s prescribing is 10% brand-name and 89% generic drugs by claim count, with $348K in brand drug costs.
Does Serign Mass Marong, M.D. prescribe opioids? ▼
Yes, Serign Mass Marong, M.D. had 128 opioid claims in 2023 with an opioid prescribing rate of 2.5%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Serign Mass Marong, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Serign Mass Marong, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Serign Mass Marong, M.D. accept Medicare? ▼
Serign Mass Marong, M.D. appears in CMS Medicare data with 5,196 Part D claims and 614 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Serign Mass Marong, M.D.'s credentials? ▼
Serign Mass Marong, M.D.'s NPI is 1386959989 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
Compiled from official public sources by the PlainDoctor editorial team.