A single method for measuring total thyroxine and free thyroxine index in serum (opens in a new tab)
J Nucl Med
Binding, CompetitiveEstrogensHyperthyroidism
Dr. Gary Ira Portnay, MD
NPI1346289345
- Medicare services, 2021
- 501
- Part D claims, 2022
- 877
- Publications
- 7
- Hospital affiliations
- 1
- Medical groups
- 2
- Practice address
- 41 & 45 Mall Road, Burlington, MA 01803
- Practice phone
- Call (781) 744-5100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Portnay's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gary Ira Portnay is an internist in Burlington, Massachusetts
Dr. Portnay practices at Lahey Clinic in Burlington, Massachusetts, part of Beth Israel Lahey Health.
Dr. Portnay's NPI, 1346289345, was assigned on June 5, 2006. Dr. Portnay graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1968. Dr. Portnay holds Massachusetts license 32439.
NPI and contact details
- NPI
- 1346289345NPI Registry (opens in a new tab)
- NPI enumeration date
- June 5, 2006
- NPI status
- Active
- Practice phone
- (781) 744-5100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 84
- Medical school graduation
- 1968
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gary Ira Portnay practices at Lahey Clinic in Burlington, Massachusetts
Dr. Portnay's primary practice is Lahey Clinic, at 41 & 45 Mall Road, Burlington, MA 01803 in Middlesex County. The practice phone is (781) 744-5100.
- Lahey Clinic41 & 45 Mall Road, Burlington, MA 01803 · Middlesex CountyPhone(781) 744-5100
Source: Dmand AI Affiliation Data
Dr. Gary Ira Portnay is affiliated with 1 site of care and 2 medical groups
Dr. Portnay's primary practice is Lahey Clinic in Burlington, Massachusetts, part of Beth Israel Lahey Health. The medical group on file is Beth Israel Lahey Health. Dmand AI also links Dr. Portnay to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary Ira Portnay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Portnay practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lahey Clinic | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gary Ira Portnay is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Portnay's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Portnay is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Portnay's licenses on file in 2 states: Massachusetts and New Hampshire.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
- New Hampshire license
Internists near Dr. Portnay
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gary Ira Portnay billed Medicare for 501 services in 2021
CMS data shows 501 Medicare services from Dr. Portnay across 7 procedure codes in 2021. Medicare paid $39,732 for them. Every service was in an office.
Medicare services, 2021501
Paid by Medicare$39,732
Procedure codes7
Dr. Portnay's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 3642021: 3702%
- Other services
- 2020: 392021: 7182%
- Tests and treatments
- 2020: 372021: 6062%
- Surgery
- 2020: 192021: 0100%
Dr. Portnay compared with the Massachusetts median for internists, 2021
- Dr. Portnay
- Massachusetts median
- Medicare services
- 501vs 43116% above
- Part D claims
- 877vs 4022.2 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Portnay's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Portnay?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Portnay and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary Ira Portnay's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Portnay's median patient age at 72, with 32% women.
Dr. Portnay's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women32%
- Men68%
Source: Dmand AI Patient Panel Data
Dr. Gary Ira Portnay wrote 877 Medicare Part D claims in 2022
In 2022, Dr. Portnay wrote 877 Medicare Part D claims. They cover 29 drugs, with $97,824 in total drug cost. In 2021, CMS named 3,082 claims across 68 drugs.
Part D claims, 2022877
Drugs named by CMS29
Total drug cost$97,824
Dr. Portnay's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 3,0822022: 87772%
Drugs named by CMS: 29 in 2022, 68 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gary Ira Portnay has 7 publications on record
Dmand AI links 7 papers to Dr. Portnay. The most frequent topics are Thyroxine, Thyrotropin and Triiodothyronine. Dr. Portnay has published most often in J Clin Endocrinol Metab.
Papers7
Topics Dr. Portnay writes about most
- Thyroxine
- Thyrotropin
- Triiodothyronine
- Hypothyroidism
- Injections, Intravenous
- Obesity
- Starvation
- Thyroxine-Binding Proteins
Recent publications by Dr. Portnay
Ann Intern Med
Biological TransportInjections, IntravenousMethadone
J Clin Endocrinol Metab
ObesityStarvationThyrotropin
J Clin Endocrinol Metab
Body WeightMetabolic Clearance RateObesity
J Clin Endocrinol Metab
Administration, OralDepression, ChemicalInjections, Intravenous
See who Dr. Portnay researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Portnay works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gary Ira Portnay has 1 award and honors on record
Dmand AI lists 1 award for Dr. Portnay, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Portnay
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Gary Ira Portnay graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Portnay graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1968. Dr. Portnay is a member of AACE.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary Ira Portnay's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gary Ira Portnay
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gary Ira Portnay's NPI number?
Dr. Gary Ira Portnay's NPI number is 1346289345. It was assigned on June 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary Ira Portnay?
Dr. Gary Ira Portnay is an internist in Burlington, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gary Ira Portnay practice?
Dr. Portnay practices at 41 & 45 Mall Road, Burlington, MA 01803. Dr. Portnay's primary practice is Lahey Clinic in Burlington, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. Portnay to 1 medical group.
What is Dr. Gary Ira Portnay's office phone number?
The practice phone on file for Dr. Portnay is (781) 744-5100.
What is Dr. Gary Ira Portnay's medical license number?
Dr. Portnay holds Massachusetts license 32439, one of the licenses on file in 2 states.
Which states has Dr. Gary Ira Portnay been licensed in?
Dmand AI has state licenses on file for Dr. Portnay in Massachusetts (1970 to 2027) and New Hampshire (2024).
Which hospitals is Dr. Gary Ira Portnay affiliated with?
Dr. Portnay practices at Lahey Clinic in Burlington, Massachusetts.
What medical group is Dr. Gary Ira Portnay part of?
Dr. Portnay is linked to Beth Israel Lahey Health. Dmand AI links Dr. Portnay to 1 more medical group.
Does Dr. Gary Ira Portnay accept Medicare?
Yes. CMS data shows Dr. Portnay billed Medicare for 501 services in 2021.
Is Dr. Gary Ira Portnay board certified?
Yes. Dr. Portnay is board certified in internal medicine by the American Board of Internal Medicine.
Show 5 more questionsShow fewer questions
What services does Dr. Gary Ira Portnay bill to Medicare?
In 2021, Dr. Portnay's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0008).
Where did Dr. Gary Ira Portnay go to medical school?
Dr. Portnay graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1968.
What drugs does Dr. Gary Ira Portnay prescribe most?
In 2022 Medicare Part D data, Dr. Portnay's most prescribed drugs by claims were Atorvastatin Calcium, Simvastatin and Lisinopril.
How long has Dr. Gary Ira Portnay been practicing?
Dr. Portnay graduated from medical school in 1968, 58 years ago.
Does Dr. Gary Ira Portnay do research?
Dmand AI links 7 publications to Dr. Portnay.
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