National Provider Identifier
Zachary R Williams, M.D.
Zachary R Williams, M.D. is listed in the NPPES registry with a primary specialty of Internal Medicine Physician in Rochester, NY and a listed phone number of (801) 455-4581.
Source: public NPPES record, last updated February 18, 2026. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.
Profile Overview
- NPI
- 1134372584
- Provider Type
- Individual
- Primary Specialty
- Internal Medicine Physician
- Enumeration Date
- October 29, 2008
- Last Updated
- February 18, 2026
Practice Location
- 310 Exchange Blvd Apt 330
- Rochester, NY 14608-2780
Phone: (801) 455-4581
Specialties
- Internal Medicine Physician (207R00000X)
- Cardiovascular Disease Physician (207RC0000X)
- Hospitalist Physician (208M00000X)
- Internal Medicine Physician (207R00000X)
Endpoints
- https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2
Fhir Url | Health Information Exchange (Hie) | Csv | Belleville, IL 62226
Bjc
Browse Similar Providers
See more Internal Medicine providers in Rochester, NY.
Medicare Part B Activity
Reported 5,126 Medicare fee-for-service service lines in 2023.
Peer comparison
Compared to Internal Medicine providers in the Rochester, NY metro area.
This provider is in the 100th percentile for Medicare service volume.
Among the highest-volume peers.
Performs about 20x the peer median number of Medicare services.
Higher than 851 of 854 peers.
- Activity Percentile
- 99.6%
- Rank by Services
- 3 of 854
- Total Services
- 5,126
- Est. Allowed Value
- $281,074.65
- Dataset Year
- 2023
- Drug Code Share
- 0.5%
Estimated allowed value reflects Medicare fee-for-service allowed amounts only. It does not include Medicare Advantage, commercial insurance, cash-pay services, or employment compensation.
Peers are grouped by the broader Internal Medicine classification rather than the exact subspecialty label shown elsewhere on the page.
Percentile distribution
Each bar represents a 10-point percentile band of peers by total Medicare services for Internal Medicine across the Rochester, NY metro area. Taller bars indicate higher service-volume bands. Highlighted bar marks this provider's percentile band.
Observed service range: 11 to 7,346 total Medicare services.
Top Clinical Services
- 93306: Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
1,115 services | $105,760.62
- 93010: Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
667 services | $5,200.28
- 99214: Established patient office or other outpatient visit, 30-39 minutes
519 services | $63,194.69
- 93294: Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days
367 services | $10,508.82
- 93296: Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days
333 services | $6,893.04
Common Drug-Related Codes
- Q9957: Injection, perflutren lipid microspheres, per ml
24 services | $1,039.25
Procedure Cost Comparisons
This provider appears in MedCostCompare procedure price pages built from Medicare fee-for-service data. Follow the links to compare local provider prices for the listed procedures.
Prices are Medicare-approved amounts from public provider-service records, not private insurance rates, cash-pay quotes, or a promise of what any patient will pay.
Echocardiogram | Rochester, NY
Provider price$65.68
Lower than most included providers on the linked MedCostCompare page, at the 10th price percentile.
High experience
Biography
Dr. Zachary R. Williams is a cardiologist with Intermountain Health in St. George, affiliated with St. George Regional Hospital and Cedar City Hospital. He earned his medical degree and completed an internal medicine residency at the University of Utah, then went on to a cardiovascular disease fellowship at the University of Rochester; he is board certified in cardiovascular disease. His public profile notes a particular interest in preventive cardiology, and during fellowship he co-authored a published study examining cardiac function in patients with atrial fibrillation.
Full Record
- NPI
- 1134372584
- Entity Type
- Individual
- Last Name
- Williams
- First Name
- Zachary
- Middle Name
- R
- Credential
- M.D.
- Mailing Street Address
- 310 Exchange Blvd Apt 330
- Mailing City
- Rochester
- Mailing State
- NY
- Mailing ZIP Code
- 14608-2780
- Mailing Country
- US
- Mailing Phone
- (801) 581-2401
- Practice Street Address
- 310 Exchange Blvd Apt 330
- Practice City
- Rochester
- Practice State
- NY
- Practice ZIP Code
- 14608-2780
- Practice Country
- US
- Practice Phone
- (801) 455-4581
- Enumeration Date
- October 29, 2008
- Last Updated
- February 18, 2026
- Sex
- Male
- Sole Proprietor
- Yes
- Certification Date
- February 18, 2026
- updated_by_file
- npidata_pfile_20050523-20260308.csv
- Taxonomies
- Internal Medicine Physician (207R00000X), Cardiovascular Disease Physician (207RC0000X), Hospitalist Physician (208M00000X), Internal Medicine Physician (207R00000X)
- Other Identifiers
- 03352949 (NY)