What is Alessa Crossan's NPI number?

Alessa Crossan's National Provider Identifier (NPI) is 1477848034, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Alessa Crossan's specialty?

Alessa Crossan is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).

Where is Alessa Crossan located?

Alessa Crossan's practice location on file with NPPES is 45 N Hill Dr Ste 202, Warrenton, VA 20186-2677.

What is Alessa Crossan's phone number?

The practice phone number listed in the NPPES registry for Alessa Crossan is (540) 349-1882.

Does Alessa Crossan accept Medicare?

Alessa Crossan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Alessa Crossan's NPI active?

Yes — Alessa Crossan's NPI (1477848034) is active in the NPPES registry as of the last update on 2025-04-11.

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Alessa Crossan, M.D.

NPI 1477848034 · Retina Specialist (Ophthalmology) Physician · Warrenton, VA

Alessa Crossan, M.D. is a Retina Specialist (Ophthalmology) Physician provider in Warrenton, VA (NPI 1477848034).

Provider details

NPI number: 1477848034
Entity type: Individual
Primary specialty: Retina Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Female
Sole proprietor: No
License: 63863 (WI)

Practice location

45 N Hill Dr Ste 202

Warrenton, VA 20186-2677

Phone: (540) 349-1882

Street-level locationGet directions

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Mailing address

45 N Hill Dr Ste 202

Warrenton, VA 20186-2677

Specialties & taxonomies

Retina Specialist (Ophthalmology) PhysicianPrimary207WX0107XLicense 0101262608 (VA)
Allopathic & Osteopathic Physicians
Ophthalmology Physician207W00000XLicense 63863 (WI)
Allopathic & Osteopathic Physicians
Retina Specialist (Ophthalmology) Physician207WX0107XLicense MD045246 (DC)
Allopathic & Osteopathic Physicians

Additional practice locations (1)

21475 Ridgetop Circle Suite 300
Sterling, VA 20166-8580
Phone: (703) 430-4400

Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(72/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
15 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
2 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
2,094 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 methodology.

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)
Imaging of Retina92134	903	$39
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	424	$89
Injection of Drug Into Eye67028	397	$110
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	213	$122
Photography of the Retina92250	69	$35
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	36	$161

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Latanoprost	52	16
Prednisolone Acetate	42	23
Ofloxacin	28	21
Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol	27	11
Timolol Maleate	21	11
Dorzolamide Hcl	20	—
Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth	20	17

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$155 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.

Enumerated: 2011-06-12
Last updated: 2025-04-11
Certified: 2025-04-11

Frequently asked questions

What is Alessa Crossan's NPI number?: Alessa Crossan's National Provider Identifier (NPI) is 1477848034, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Alessa Crossan's specialty?: Alessa Crossan is listed in the NPPES registry with a primary specialty of Retina Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).
Where is Alessa Crossan located?: Alessa Crossan's practice location on file with NPPES is 45 N Hill Dr Ste 202, Warrenton, VA 20186-2677.
What is Alessa Crossan's phone number?: The practice phone number listed in the NPPES registry for Alessa Crossan is (540) 349-1882.
Does Alessa Crossan accept Medicare?: Alessa Crossan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Alessa Crossan's NPI active?: Yes — Alessa Crossan's NPI (1477848034) is active in the NPPES registry as of the last update on 2025-04-11.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

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)
Imaging of Retina92134	903	$39
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	424	$89
Injection of Drug Into Eye67028	397	$110
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	213	$122
Photography of the Retina92250	69	$35
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	36	$161

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Latanoprost	52	16
Prednisolone Acetate	42	23
Ofloxacin	28	21
Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol	27	11
Timolol Maleate	21	11
Dorzolamide Hcl	20	—
Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth	20	17

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$155 across 6 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (1)

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (1)

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments