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Dr. Angel Joel Diaz Martinez, MD
NPI1518510825PAC ID9739502881
- Medicare services, 2024
- 4,386
- Medicare patients, 2024
- 852
- Part D claims, 2024
- 1,569
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 92 Montvale Ave, Stoneham, MA 02180
- Practice phone
- Call (781) 438-6350
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mystic Valley Dermatology Associates
Stoneham, Massachusetts
Find Dr. Diaz Martinez's professional email, personal email and mobile number
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Dr. Angel Joel Diaz Martinez is a dermatologist in Stoneham, Massachusetts
Dr. Diaz Martinez practices at Mystic Valley Dermatology Associates in Stoneham, Massachusetts.
Dr. Diaz Martinez's NPI, 1518510825, was assigned on July 17, 2019. Dr. Diaz Martinez graduated from Ponce School of Medicine in 2019. Dr. Diaz Martinez holds Massachusetts license 1014073.
NPI and contact details
- NPI
- 1518510825NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739502881
- NPI enumeration date
- July 17, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (781) 438-6350
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Angel Joel Diaz Martinez practices at Mystic Valley Dermatology Associates in Stoneham, Massachusetts
Dr. Diaz Martinez's primary practice is Mystic Valley Dermatology Associates, at 92 Montvale Ave, Stoneham, MA 02180 in Middlesex County. The practice phone is (781) 438-6350.
- Mystic Valley Dermatology Associates92 Montvale Ave, Stoneham, MA 02180 · Middlesex CountyPhone(781) 438-6350
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Angel Joel Diaz Martinez is affiliated with 3 sites of care and 1 medical group
Dr. Diaz Martinez's primary practice is Mystic Valley Dermatology Associates in Stoneham, Massachusetts. Dr. Diaz Martinez is also affiliated with Winchester Hospital. The medical group on file is Mystic Valley Dermatology Associates. Dmand AI also links Dr. Diaz Martinez to 1 more group practice or clinic, named with a free account.
Mystic Valley Dermatology AssociatesPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Angel Joel Diaz Martinez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diaz Martinez practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mystic Valley Dermatology Associates | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Angel Joel Diaz Martinez is one of 562 dermatologists in Massachusetts
Dermatology is Dr. Diaz Martinez's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Diaz Martinez is licensed in Massachusetts.
Specialties and state licenses
- Dermatology, MassachusettsPrimary
Dermatologists near Dr. Diaz Martinez
Counts of dermatologists with a Dmand AI profile, by place and practice. Each opens the list.
562dermatologists in Massachusetts
6dermatologists in Stoneham
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Angel Joel Diaz Martinez billed Medicare for 4,386 services in 2024
CMS data shows 4,386 Medicare services from Dr. Diaz Martinez across 21 procedure codes in 2024, for 852 Medicare patients. Medicare paid $255,193 for them. Every service was in an office.
Medicare services, 20244,386
Medicare patients852
Paid by Medicare$255,193
Procedure codes21
Dr. Diaz Martinez's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1,0792024: 3,035181%
- Office and hospital visits
- 2023: 3352024: 1,267278%
- Drugs given in the office
- 2023: 02024: 62
- Tests and treatments
- 2023: 02024: 22
Dr. Diaz Martinez compared with the Massachusetts median for dermatologists, 2024
- Dr. Diaz Martinez
- Massachusetts median
- Medicare services
- 4,386vs 1,6102.7 times
- Medicare patients
- 852vs 48974% above
- Part D claims
- 1,459vs 3474.2 times
Medians across 559 dermatologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Diaz Martinez's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Angel Joel Diaz Martinez treated 852 Medicare patients in 2024, average age 75
CMS counts 852 Medicare patients who saw Dr. Diaz Martinez in 2024. The largest group is 65 to 74, with 357 patients. 74% of them have high cholesterol, and 71% have high blood pressure. 20% are also on Medicaid. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diaz Martinez's median patient age at 54, with 52% women.
Medicare patients, 2024852
Average age75
Average risk score1.11
Also on Medicaid20%
Dr. Diaz Martinez's Medicare patients by age, 2024
Dr. Diaz Martinez's Medicare patients by sex, 2024
- Women41048%
- Men44252%
Chronic conditions among Dr. Diaz Martinez's Medicare patients, 2024
- High cholesterol74%
- High blood pressure71%
- Arthritis42%
- Anxiety29%
- Chronic kidney disease27%
- Mood disorders26%
- Diabetes25%
- Ischemic heart disease25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diaz Martinez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Angel Joel Diaz Martinez wrote 1,569 Medicare Part D claims in 2024
In 2024, Dr. Diaz Martinez wrote 1,569 Medicare Part D claims for 626 patients. 92% of them were for generic drugs. CMS names the drug for 1,459 of them, across 21 drugs with 11 or more claims each, at $207,835 in total drug cost. In 2023, CMS named 341 claims across 9 drugs.
Part D claims, 20241,569
Drugs named by CMS21
Total drug cost$207,835
Part D patients626
Dr. Diaz Martinez's Part D claims by kind of drug, 2024
- Generic1,445 claims92%
- Brand-name124 claims8%
Dr. Diaz Martinez's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Diaz Martinez's Part D claims, 2024
- Antibiotics6%87 of 1,569 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3412024: 1,459328%
Drugs named by CMS: 21 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Angel Joel Diaz Martinez ranks in the 93rd percentile for removal of skin lesions in Medicare
Dr. Diaz Martinez accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Diaz Martinez as offering telehealth. CMS counts 1,018 procedures of removal of skin lesions by Dr. Diaz Martinez, more than 93% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Diaz Martinez ranks in Medicare procedure volume
- Removal of skin lesions
- 93rd percentile1,018 procedures
- Skin biopsy
- 92nd percentile332 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Angel Joel Diaz Martinez has 1 publication on record
Dmand AI links 1 paper to Dr. Diaz Martinez in 2019. Dr. Diaz Martinez's most frequent co-authors are Navkaranbir S. Bajaj, MD, Paco Eduardo Bravo, MD and Abhishek Keraliya, MD.
Papers1
Dr. Diaz Martinez's most frequent co-authors
- Navkaranbir S. Bajaj, MD1 shared paper
- Paco Eduardo Bravo, MD1 shared paper
- Abhishek Keraliya, MD1 shared paper
Recent publications by Dr. Diaz Martinez
See who Dr. Diaz Martinez researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Diaz Martinez works with, so you can find a warm path to the right dermatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Angel Joel Diaz Martinez received $18,060 in industry payments from 2023 to 2025
CMS Open Payments shows 97 general payments to Dr. Diaz Martinez from 12 drug and device companies from 2023 to 2025. Consulting fees make up the largest share, 74% of the total. Bristol-Myers Squibb Company paid the most, $16,379.
General payments to Dr. Diaz Martinez by program year, 2023 to 2025
General payments to Dr. Diaz Martinez by kind, 2023 to 2025
$18.1Kin total
- Consulting fees$13,29074%
- Food and beverage$2,94516%
- Travel and lodging$1,82510%
Companies that paid Dr. Diaz Martinez the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Angel Joel Diaz Martinez graduated from Ponce School of Medicine
Dr. Diaz Martinez graduated from Ponce School of Medicine in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Angel Joel Diaz Martinez'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Angel Joel Diaz Martinez
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. Angel Joel Diaz Martinez's NPI number?
Dr. Angel Joel Diaz Martinez's NPI number is 1518510825. It was assigned on July 17, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Angel Joel Diaz Martinez?
Dr. Angel Joel Diaz Martinez is a dermatologist in Stoneham, Massachusetts. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Angel Joel Diaz Martinez practice?
Dr. Diaz Martinez practices at 92 Montvale Ave, Stoneham, MA 02180. Dr. Diaz Martinez's primary practice is Mystic Valley Dermatology Associates in Stoneham, Massachusetts. Dmand AI also links Dr. Diaz Martinez to 1 group practice or clinic.
What is Dr. Angel Joel Diaz Martinez's office phone number?
The practice phone on file for Dr. Diaz Martinez is (781) 438-6350.
What is Dr. Angel Joel Diaz Martinez's medical license number?
Dr. Diaz Martinez holds Massachusetts license 1014073.
Which hospitals is Dr. Angel Joel Diaz Martinez affiliated with?
Dr. Diaz Martinez is affiliated with Winchester Hospital.
What medical group is Dr. Angel Joel Diaz Martinez part of?
Dr. Diaz Martinez is linked to Mystic Valley Dermatology Associates.
Does Dr. Angel Joel Diaz Martinez accept Medicare?
Yes. CMS data shows Dr. Diaz Martinez billed Medicare for 4,386 services in 2024, and Dr. Diaz Martinez accepts Medicare assignment.
Does Dr. Angel Joel Diaz Martinez offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Diaz Martinez as offering telehealth services.
How many Medicare patients does Dr. Angel Joel Diaz Martinez see?
CMS counts 852 Medicare patients who saw Dr. Diaz Martinez in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Angel Joel Diaz Martinez bill to Medicare?
In 2024, Dr. Diaz Martinez's most billed Medicare services were surgery: skin and soft tissue (17003), surgery: skin and soft tissue (17110) and office visit, established patient (99214).
Where did Dr. Angel Joel Diaz Martinez go to medical school?
Dr. Diaz Martinez graduated from Ponce School of Medicine in 2019.
What drugs does Dr. Angel Joel Diaz Martinez prescribe most?
In 2024 Medicare Part D data, Dr. Diaz Martinez's most prescribed drugs by claims were Triamcinolone Acetonide, Mupirocin and Ketoconazole.
Has Dr. Angel Joel Diaz Martinez received payments from drug or device companies?
CMS Open Payments shows $18,060 in general payments to Dr. Diaz Martinez from 12 companies from 2023 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Angel Joel Diaz Martinez been practicing?
Dr. Diaz Martinez graduated from medical school in 2019, 7 years ago.
Does Dr. Angel Joel Diaz Martinez do research?
Dmand AI links 1 publication to Dr. Diaz Martinez.
Who does Dr. Angel Joel Diaz Martinez publish with?
Dr. Diaz Martinez's most frequent co-authors are Navkaranbir S. Bajaj, MD (1 shared paper), Paco Eduardo Bravo, MD (1 shared paper) and Abhishek Keraliya, MD (1 shared paper).
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