National Provider Identifier
Olga Vasylyeva, M.D.
Olga Vasylyeva, M.D. is listed in the NPPES registry with a primary specialty of Infectious Disease Physician in Greenwich, CT and a listed phone number of (203) 869-8838.
Source: public NPPES record, last updated June 25, 2026. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.
Profile Overview
- NPI
- 1235455072
- Provider Type
- Individual
- Primary Specialty
- Infectious Disease Physician
- Enumeration Date
- April 19, 2010
- Last Updated
- June 25, 2026
Practice Location
- 5 Perryridge RD
- Greenwich, CT 06830-4608
Phone: (203) 869-8838
Specialties
- Infectious Disease Physician (207RI0200X)
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Medicare Part B Activity
Reported 117 Medicare fee-for-service service lines in 2024.
Peer comparison
Compared to Internal Medicine providers in the Rochester, NY metro area.
This provider is in the 18th percentile for Medicare service volume.
Lower volume than many peers.
Performs 57% fewer Medicare services than the peer median.
Higher than 154 of 858 peers.
- Activity Percentile
- 17.9%
- Rank by Services
- 703 of 858
- Total Services
- 117
- Est. Allowed Value
- $10,810.36
- Dataset Year
- 2024
- Drug Code Share
- 0.0%
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 6,379 total Medicare services.
Top Clinical Services
- 99232: Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
56 services | $4,309.96
- 99222: Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
23 services | $2,984.24
- 99233: Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
20 services | $2,234.76
- 99213: Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
18 services | $1,281.40
Full Record
- NPI
- 1235455072
- Entity Type
- Individual
- Last Name
- Vasylyeva
- First Name
- Olga
- Credential
- M.D.
- Mailing Street Address
- 5 Perryridge RD
- Mailing City
- Greenwich
- Mailing State
- CT
- Mailing ZIP Code
- 06830-4608
- Mailing Country
- US
- Mailing Phone
- (203) 869-8838
- Practice Street Address
- 5 Perryridge RD
- Practice City
- Greenwich
- Practice State
- CT
- Practice ZIP Code
- 06830-4608
- Practice Country
- US
- Practice Phone
- (203) 869-8838
- Enumeration Date
- April 19, 2010
- Last Updated
- June 25, 2026
- Sex
- Female
- Sole Proprietor
- No
- Certification Date
- June 25, 2026
- Taxonomies
- Infectious Disease Physician (207RI0200X)
- Other Identifiers
- 04164274 (NY)