DOUGLAS R GRONDA MD
NPI 1962463109
Internal Medicine in Holliston, MA

Q: What is Douglas Gronda's NPI number?

The NPI number for Douglas Gronda is 1962463109. It was assigned to this individual provider in the NPPES registry on March 29, 2006.

Q: What is Douglas Gronda's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Douglas Gronda was last updated on October 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since March 29, 2006PECOS EnrolledAccepts Medicare Assignment

479 WASHINGTON ST, HOLLISTON, MA 01746(508) 429-2377(508) 429-2607 Get Directions Write a Review

NPPES record last updated: October 30, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 30, 2023, Mar 29, 2023, Oct 31, 2022 (3 updates tracked since 2022).

On this page

About Douglas R Gronda Md NPPES

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

DOUGLAS R GRONDA MD (NPI 1962463109) is an individual internal medicine provider in Holliston, Massachusetts, licensed in Massachusetts (214551) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Milford Regional Medical Center, and is a graduate of Boston University School Of Medicine (1999).

NPPES Registry Identity

NPI1962463109

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDOUGLAS R GRONDACredential: MD

Location Address479 WASHINGTON STHolliston, MA 01746

Mailing Address171 Main St Ste 203bAshland, MA 01721-1187 · (508) 881-3029 · Fax (508) 881-1752

Phone(508) 429-2377

Fax(508) 429-2607

Sole ProprietorNo

Medical School CMSBoston University School Of MedicineGraduated 1999

Enumeration DateMarch 29, 2006

Last NPPES UpdateOctober 30, 20233 updates tracked since enumeration

NPPES CertifiedOctober 30, 2023

✔ NPI 1962463109 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · 214551

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

479 WASHINGTON ST, Holliston, MA 01746

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Other Identifiers 1

Medicaid110007205AMA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Taro Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Douglas R Gronda 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 ID1759412661

PECOS Enrollment IDI20100621000781

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.

Medicare Billing Reassignment

Medicare enrollment records show Douglas Gronda reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Charles River Medical Associates PC

6.1 mi

Internal Medicine

600 WORCESTER RD, SUITE 303
Framingham, MA 01702

Reassigned Medicare billing, Massachusetts enrollment
122 clinicians in this Medicare group

NPI 1598215204 (508) 881-3029

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 13

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.

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

471 services260 patients

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.

459 services243 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

107 services83 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

104 services24 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

74 services73 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

73 services72 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

44 services44 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

31 services19 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.

21 services18 patients

Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a G0179

This procedure involves a doctor or approved practitioner reviewing your health status and re-certifying your need for Medicare-covered home health services. It includes communication with the home health agency and assessment of your health reports, even when you're not physically present.

18 services14 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

18 services18 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

16 services16 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

16 services16 patients

Hospital Affiliations CMS Care Compare 5

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

Milford Regional Medical Center

Acute Care Hospitals · Milford, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number220090

Location14 Prospect StreetMilford, MA 01757 · Worcester County

Emergency services Birthing friendly

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220101

Location2014 Washington StreetNewton, MA 02462 · Middlesex County

Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220110

Location75 Francis StreetBoston, MA 02115 · Suffolk County

Emergency services Birthing friendly

Faulkner Hospital-Brigham And Women's

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220119

Location1153 Centre StreetBoston, MA 02130 · Suffolk County

Emergency services

Metrowest Medical Center

Acute Care Hospitals · Framingham, MA

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220175

Location115 Lincoln StreetFramingham, MA 01701 · Middlesex County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01746 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

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

4 suppliers13 claims39 services$5.57 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 5

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

MOHAMMAD M SIDDIQUI MD

Internal Medicine

479 WASHINGTON ST
HOLLISTON, MA 01746

Middlesex County (508) 429-2377

CASEY MCLAUGHLIN NP

Nurse Practitioner (Family)

479 WASHINGTON ST
HOLLISTON, MA 01746

Middlesex County (508) 429-2377

FOR A NEW YOU PC

Dentist

479 WASHINGTON ST
HOLLISTON, MA 01746

Middlesex County (508) 429-7125

BARBARA A PREUSSNER DMD, PC

Clinic/Center (Dental)

479 WASHINGTON ST, SUITE 2
HOLLISTON, MA 01746

Middlesex County (508) 429-7125

MENG GAO NP

Nurse Practitioner (Family)

479 WASHINGTON ST
HOLLISTON, MA 01746

Middlesex County (508) 429-2377

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 Douglas Gronda's NPI number?

The NPI number for Douglas Gronda is 1962463109. It was assigned to this individual provider in the NPPES registry on March 29, 2006.

Where is Douglas Gronda located?

Douglas Gronda practices at 479 Washington St, Holliston, MA 01746. The listed phone number is (508) 429-2377.

What is Douglas Gronda's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Douglas Gronda enrolled in Medicare?

Yes. Douglas Gronda 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.

Which organization bills Medicare for Douglas Gronda's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Douglas Gronda reassigns Medicare benefits to Charles River Medical Associates PC (Framingham, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Douglas Gronda's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Douglas Gronda accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Douglas Gronda 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 Douglas Gronda affiliated with any hospitals?

According to CMS data, Douglas Gronda is affiliated with Milford Regional Medical Center, Newton-Wellesley Hospital, Brigham And Women's Hospital, Faulkner Hospital-Brigham And Women's and Metrowest Medical Center.

When was this NPI record last updated?

The NPPES record for Douglas Gronda was last updated on October 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.