JOEL MASON MD
NPI 1164539292
Internal Medicine - Gastroenterology in Boston, MA

Active since August 24, 2006PECOS EnrolledAccepts Medicare Assignment
750 WASHINGTON ST, NEMC BOX 836, BOSTON, MA 02111(617) 636-5000 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Joel Mason Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOEL MASON MD (NPI 1164539292) is an individual gastroenterology provider in Boston, Massachusetts, licensed in Massachusetts (57484) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Tufts Medical Center, and is a graduate of University Of Chicago, Pritzker School Of Medicine (1981).

NPPES Registry Identity

NPI1164539292
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameJOEL MASONCredential: MD
Location Address750 WASHINGTON ST, NEMC BOX 836Boston, MA 02111-1526
Mailing Address750 Washington St, Nemc Box 836Boston, MA 02111-1526 · (617) 636-7105 · Fax (617) 636-6204
Sole ProprietorNo
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 1981
Enumeration DateAugust 24, 2006
Last NPPES UpdateJuly 8, 2007
NPI 1164539292 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License Licensed in MA · 57484
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
750 WASHINGTON ST, Boston, MA 02111

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Joel Mason Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375590227
PECOS Enrollment IDI20050404000574
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
30 services24 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
18 services14 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Tufts Medical Center

Acute Care Hospitals · Boston, MA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220116
Location800 Washington StreetBoston, MA 02111 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02111 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 10

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
2 suppliers19 claims570 services$4.35 avg. paid by Medicare
Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185
Other-Enteral and Parenteral · category OB005N
3 suppliers187 claims2,534 services$11.26 avg. paid by Medicare
Omegaven, 10 grams lipids B4187
Treatment-Injections and Infusions (nononcologic) · category RI000N
1 supplier50 claims836 services$11.15 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements, and vitamins, including preparation, any strength, 10 to 51 grams of protein - premix B4189
Other-Enteral and Parenteral · category OB005N
2 suppliers87 claims529 services$177.77 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements, and vitamins, including preparation, any strength, 52 to 73 grams of protein - premix B4193
Other-Enteral and Parenteral · category OB005N
2 suppliers87 claims553 services$230.66 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, 74 to 100 grams of protein - premix B4197
Other-Enteral and Parenteral · category OB005N
2 suppliers72 claims499 services$279.83 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Dietitian, Registered
750 WASHINGTON ST, TNEMC BOX#434
BOSTON, MA 02111
Nurse Anesthetist, Certified Registered
750 WASHINGTON ST, NEMC BOX #7105
BOSTON, MA 02111
Pharmacist (Psychiatric)
750 WASHINGTON ST, THE HEALTH INSTITUTE, BOX 345
BOSTON, MA 02111
Dietitian, Registered
750 WASHINGTON ST, FRANCES STERN NUTRITION CENTER
BOSTON, MA 02111
Emergency Medicine
750 WASHINGTON ST, BOX 311 / DEPARTMENT OF EMERGENCY MEDICINE
BOSTON, MA 02111
Internal Medicine (Interventional Cardiology)
750 WASHINGTON ST
BOSTON, MA 02111
Pediatrics (Pediatric Pulmonology)
750 WASHINGTON ST, NEMC BOX #836
BOSTON, MA 02111
Obstetrics & Gynecology
750 WASHINGTON ST, NEMC BOX #836
BOSTON, MA 02111

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joel Mason's NPI number?

The NPI number for Joel Mason is 1164539292. It was assigned to this individual provider in the NPPES registry on August 24, 2006.

Where is Joel Mason located?

Joel Mason practices at 750 Washington St Nemc Box 836, Boston, MA 02111. The listed phone number is (617) 636-5000.

What is Joel Mason's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Joel Mason enrolled in Medicare?

Yes. Joel Mason is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Joel Mason accept?

Health plans from Anthem Blue Cross and Blue Shield list Joel Mason as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Joel Mason affiliated with any hospitals?

According to CMS data, Joel Mason is affiliated with Tufts Medical Center.

When was this NPI record last updated?

The NPPES record for Joel Mason was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.