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LARS FREISBERG MD
NPI 1659325454
Ophthalmology in Phoenix, AZ

Active since May 19, 2006PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
4045 E UNION HILLS DR STE 115, PHOENIX, AZ 85050(602) 368-3448(602) 357-3323 Get Directions Write a Review

NPPES record last updated: December 11, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Dec 11, 2025, Oct 2, 2015 (2 updates tracked since 2015).

About Lars Freisberg Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LARS FREISBERG MD (NPI 1659325454) is an individual ophthalmology provider in Phoenix, Arizona, licensed in Arizona (78852) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1994).

NPPES Registry Identity

NPI1659325454
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameLARS FREISBERGCredential: MD
Location Address4045 E UNION HILLS DR STE 115Phoenix, AZ 85050-3388
Mailing Address4045 E Union Hills Dr Ste 115Phoenix, AZ 85050-3388 · (602) 368-3448 · Fax (602) 357-3323
Phone(602) 368-3448
Fax(602) 357-3323
Sole ProprietorNo
Medical School CMSOtherGraduated 1994
Enumeration DateMay 19, 2006
Last NPPES UpdateDecember 11, 20252 updates tracked since enumeration
NPPES CertifiedDecember 11, 2025
✔ NPI 1659325454 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in AZ · 78852
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
4045 E UNION HILLS DR STE 115, Phoenix, AZ 85050
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Other Identifiers 1

Medicaid249740AZ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health, Oscar Health Plan, Inc. and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Lars Freisberg Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1052387453
PECOS Enrollment IDI20251223003323
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Lars Freisberg reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Cameron Ria LLC
Same address
Ophthalmology
4045 E UNION HILLS DR STE 115
Phoenix, AZ 85050
  • Reassigned Medicare billing, Arizona enrollment
  • 7 clinicians in this Medicare group
NPI 1346550530 (602) 368-3448

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85050 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$69.24 typical visit price
range $17.72 – $137.41
Typical copayment $17.31 (range $4.43 – $34.35)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality100
Improvement Activities40

Reported Quality Measures

Age-Related Macular Degeneration (AMD): Counseling on Antioxidant Supplement
Percentage of patients aged 50 years and older with a diagnosis of age-related macular degeneration (AMD) or their caregiver(s) who were counseled within 12 months on the benefits and/or risks of the Age-Related Eye Disease Study (AREDS) formulation for…
82%1,128 patients4/55-star benchmark: 100%
Age-Related Macular Degeneration (AMD): Dilated Macular Examination
Percentage of patients aged 50 years and older with a diagnosis of age-related macular degeneration (AMD) who had a dilated macular examination performed which included documentation of the presence or absence of macular thickening or geographic atrophy or…
100%1,128 patients5/55-star benchmark: 100%
Closing the Referral Loop: Receipt of Specialist Report
Percentage of patients with referrals, regardless of age, for which the referring provider receives a report from the provider to whom the patient was referred
65%113 patients3/55-star benchmark: 95%
Diabetes: Eye Exam
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
100%1,022 patients5/55-star benchmark: 100%
Diabetic Retinopathy: Communication with the Physician Managing Ongoing Diabetes Care
Percentage of patients aged 18 years and older with a diagnosis of diabetic retinopathy who had a dilated macular or fundus exam performed with documented communication to the physician who manages the ongoing care of the patient with diabetes mellitus…
100%918 patients5/55-star benchmark: 100%
Diabetic Retinopathy: Documentation of Presence or Absence of Macular Edema and Level of Severity of Retinopathy
Percentage of patients aged 18 years and older with a diagnosis of diabetic retinopathy who had a dilated macular or fundus exam performed which included documentation of the level of severity of retinopathy and the presence or absence of macular edema during…
100%919 patients5/55-star benchmark: 100%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
100%6,232 patients5/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
100%92 patients5/55-star benchmark: 100%
Falls: Screening for Future Fall Risk
Percentage of patients 65 years of age and older who were screened for future fall risk during the measurement period
0%2,135 patients1/55-star benchmark: 99%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
0%1,961 patients1/55-star benchmark: 97%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
0%1,815 patients1/55-star benchmark: 88%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients screenedForUse: 98% · 1,554 patients
Patients tobacco: 92% · 1,554 patients
36%143 patients2/55-star benchmark: 98%
Primary Open-Angle Glaucoma (POAG): Optic Nerve Evaluation
Percentage of patients aged 18 years and older with a diagnosis of primary open-angle glaucoma (POAG) who have an optic nerve head evaluation during one or more office visits within 12 months
99%205 patients4/55-star benchmark: 100%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
81%1,792 patients4/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
84%1,792 patients5/55-star benchmark: 79%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 0% · 2,135 patients
0%2,135 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. SHARAM DANESH MD
Ophthalmology
4045 E UNION HILLS DR STE 115
PHOENIX, AZ 85050
Maricopa County (602) 368-3448
ALEX SONG MD
Ophthalmology
4045 E UNION HILLS DR STE 115
PHOENIX, AZ 85050
Maricopa County (602) 368-3448
CAMERON RIA LLC
Ophthalmology
4045 E UNION HILLS DR STE 115
PHOENIX, AZ 85050
Maricopa County (602) 368-3448

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lars Freisberg's NPI number?

The NPI number for Lars Freisberg is 1659325454. It was assigned to this individual provider in the NPPES registry on May 19, 2006.

Where is Lars Freisberg located?

Lars Freisberg practices at 4045 E Union Hills Dr Ste 115, Phoenix, AZ 85050. The listed phone number is (602) 368-3448.

What is Lars Freisberg's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Lars Freisberg enrolled in Medicare?

Yes. Lars Freisberg is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Lars Freisberg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lars Freisberg reassigns Medicare benefits to Cameron Ria LLC (Phoenix, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lars Freisberg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Lars Freisberg accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Oscar Health Plan, Inc. and UnitedHealthcare list Lars Freisberg as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Lars Freisberg was last updated on December 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.