Kristy Zerfass, P.A.
NPI 1558769935 · Surgical Physician Assistant · Danbury, CT
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kristy Zerfass, P.A. is a Surgical Physician Assistant provider in Danbury, CT (NPI 1558769935).
Provider details
- NPI number
- 1558769935
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Female
- Sole proprietor
- No
- License
- 3253 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
217 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 122 | $80 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 48 | $99 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 30 | $59 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 17 | $114 |
Typical Medicare-allowed amounts for these services range $59–$114 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methylprednisolone | 189 | 182 |
| Tizanidine Hcl | 121 | 72 |
| Meloxicam | 117 | 61 |
| Ibuprofen | 88 | 77 |
| Oxycodone Hcl | 50 | 32 |
| Gabapentin | 40 | 12 |
| Tramadol Hcl | 37 | 29 |
| Cyclobenzaprine Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$133 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-12-16
- Last updated
- 2014-12-16
Frequently asked questions
- What is Kristy Zerfass's NPI number?
- Kristy Zerfass's National Provider Identifier (NPI) is 1558769935, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kristy Zerfass's specialty?
- Kristy Zerfass is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kristy Zerfass located?
- Kristy Zerfass's practice location on file with NPPES is 20 Germantown Rd, Danbury, CT 06810-5023.
- What is Kristy Zerfass's phone number?
- The practice phone number listed in the NPPES registry for Kristy Zerfass is (203) 744-9700.
- Does Kristy Zerfass accept Medicare?
- Kristy Zerfass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kristy Zerfass's NPI active?
- Yes — Kristy Zerfass's NPI (1558769935) is active in the NPPES registry as of the last update on 2014-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.