Dr. Gregory A Libby , DDS
Dentist - Prosthodontics • Phoenix, AZ
20950 N Tatum Blvd Ste 340
Phoenix, AZ 850504256
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Gregory Libby is listed in NPPES under Dentist - Prosthodontics.
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NPI assigned on September 14, 2006; this date does not establish years in practice.
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Published CMS data list 18 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Azithromycin — 18 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 26 in 2018 to 18 in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018–2023.
Practice Location & Contact Primary Location
20950 N Tatum Blvd Ste 340
Phoenix, AZ 850504256
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Dentist - Prosthodontics: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
18 standardized 30-day fills in 2023
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$55 in 2023
The total cost of these prescriptions in 2023, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023.
Open Payments general payments, program year 2025
All general payments: $49.78 across 3 records.
By nature of payment
- Food and Beverage: $49.78 across 3 records.
Reporting-company totals
- VOCO America Inc.: $19.06 across 1 record.
- BioHorizons Implant Systems Inc.: $17.08 across 1 record.
- Ultradent Products Inc: $13.64 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Phoenix and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Libby are from 2023.
11 active clinicians are listed under Dentist - Prosthodontics with a practice address in Phoenix, AZ (59 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Phoenix
0% of these 11 clinicians have the CMS telehealth indicator.
0% of these 11 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 31% from 26 in 2018 to 18 in 2023.
- 2018: 26
- 2020: 27
- 2021: 43
- 2022: 11
- 2023: 18
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30-day fills
30-day fills decreased 31% from 26 in 2018 to 18 in 2023.
- 2018: 26
- 2020: 27
- 2021: 43
- 2022: 11
- 2023: 18
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Part D drug cost
Part D drug cost went from $136 in 2018 to $55 in 2023.
- 2018: $136
- 2020: $180
- 2021: $245
- 2022: $87
- 2023: $55
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $30.92 in 2020 to $49.78 in 2025.
- 2020: $30.92
- 2022: $18.53
- 2023: $87.76
- 2024: $34.52
- 2025: $49.78
Sources: CMS Medicare Part D Prescribers (2023), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $49.78.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| VOCO America Inc. |
Food and Beverage
In-kind items and services
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Futurabond U | General | $19.06 |
| BioHorizons Implant Systems Inc. |
Food and Beverage
In-kind items and services
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BioHorizons Dental Implants | General | $17.08 |
| Ultradent Products Inc |
Food and Beverage
Cash or cash equivalent
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Opalescence | General | $13.64 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Azithromycin | Azithromycin | 18 | 90 | $55.01 | — |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 1223P0700X
That branch of dentistry pertaining to the restoration and maintenance of oral functions, comfort, appearance and health of the patient by the restoration of natural teeth and/or the replacement of missing teeth and contiguous oral and maxillofacial tissues with artificial substitutes.
Career & Practice History
NPI enumerated September 14, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Dentist - Prosthodontics Specialists in Phoenix
- Dr. Ramin Damadzadeh, DDS
- Dr. George Eifler, DDS, MS
- Douglas Benting
- Dr. Jonathan Bensoussan, DDS
- Dr. Paul Marischen, DDS
Mailing Address
20950 N Tatum Blvd Ste 340
Phoenix, AZ 850504256
Phone: 4805029833