Douglas J Grunwald, MD
Gastroenterology Internal Medicine
Douglas J Grunwald is a Gastroenterology Internal Medicine specialist based in Hamden, CT with over 15 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Douglas J Grunwald, MD has been part of the Hamden medical community since 2011 in group practice. A University of Chicago, Pritzker School of Medicine graduate since 2011, he brings 15+ years of experience. CMS Medicare data shows his patients commonly have high cholesterol, hypertension, and arthritis. CMS MIPS quality score: 90.75/100 (2023).
At a glance
- Federal MIPS score higher than 58% of MIPS-scored doctors in Connecticut
- Virtual visits available — no app or travel required
Older · 1403dNPPES updated 2022-07-21 · verify NPI on CMS · Verify license at Connecticut Medical Examining Board
Contact & Location
Practice Location
2200 Whitney Ave Ste 360, Hamden, CT 06518-3602
How Does This Doctor Compare?
Based on Medicare data, this doctor has an average quality score compared to other doctors in Connecticut.
MIPS Score
202390.75/100
Connecticut avg: 84.5 · US avg: 83.6
✓ Higher than most doctors nationally(+7.2 pts)
Average range among MIPS-scored doctors in ConnecticutHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Generic Rx
↑ Higher = better73.9%
Connecticut avg: 81.1 · US avg: 82.8
⚠ Lower than most doctors nationally(-8.9 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
281
Unique beneficiaries
Standard volumePrescription Recipients
357
Patients prescribed
Prescriptions Written
1,085
Total claims
Total Medicare drug cost: $608k
Percentile rankings compared against 1,825 reporting peers in Connecticut.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+3%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+3%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Excessive worry or fear that interferes with daily life
US avg: 34.1%↑ More patients than average (+3%) — a focus area for this doctor
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↑ More patients than average (+1%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-6%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-4%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$1.2k received from industry
58 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Douglas J Grunwald's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2011
University of Chicago, Pritzker School of Medicine
Board certified · May 26, 2021
Self-reported via NPPES
15 years in practice
Experienced
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Education & Training
University of Chicago, Pritzker School of Medicine (Class of 2011)
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 450672
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Douglas J Grunwald
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Douglas J Grunwald for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Hamden required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Douglas J Grunwald
Dr. Grunwald is listed as active in the NPI registry with telehealth listed in Hamden, CT. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (203) 281-4463.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Douglas J Grunwald
Practice Location
2200 Whitney Ave Ste 360, Hamden, CT 06518-3602
Mailing Address
2200 Whitney Ave Ste 360, Hamden, CT 06518-3602
This is a provider directory. Contact the office directly to schedule appointments.
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