Dr. William R. Gianni , DDS
Dentist • Concord, CA
2975 Treat Blvd Bldg D
Concord, CA 945183601
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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NPI assigned on August 29, 2006; this date does not establish years in practice.
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Published CMS data list 11 Medicare Part D prescriptions, including refills, in 2014.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014. Published rows only; this is not a quality measure.
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Published Part D records, 2014:
- Chlorhexidine Gluconate — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014. 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
Practice Location & Contact Primary Location
2975 Treat Blvd Bldg D
Concord, CA 945183601
NPPES lists 1 additional practice-address record in Berkeley, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Dentist: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
11 standardized 30-day fills in 2014
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
$158 in 2014
The total cost of these prescriptions in 2014, 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, 2014.
Open Payments general payments, program year 2025
All general payments: $58.67 across 2 records.
By nature of payment
- Food and Beverage: $58.67 across 2 records.
Reporting-company totals
- ZIMVIE INC.: $44.18 across 1 record.
- Dentsply Sirona Inc: $14.49 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 Concord and California
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Gianni are from 2014.
45 active clinicians are listed under Dentist with a practice address in Concord, CA (14,738 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Concord
0% of these 45 clinicians have the CMS telehealth indicator.
0% of these 45 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
CMS data for Part D prescriptions are available for 2014 only.
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30-day fills
CMS data for 30-day fills are available for 2014 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2014 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $13.11 in 2020 to $58.67 in 2025.
- 2020: $13.11
- 2021: $44.98
- 2023: $43.70
- 2025: $58.67
Sources: CMS Medicare Part D Prescribers (2014), 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 $58.67.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ZIMVIE INC. |
Food and Beverage
In-kind items and services
|
BELLATEK | General | $44.18 |
| Dentsply Sirona Inc |
Food and Beverage
In-kind items and services
|
Implant Dentistry | General | $14.49 |
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 2014.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Chlorhexidine Gluconate | Chlorhexidine Gluconate | 11 | 168 | $157.55 | — |
Source: CMS Part D by Provider and Drug, 2014; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-02-04NUCC Taxonomy Code: 122300000X
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
NUCC Taxonomy Code: 122300000X
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
Secondary Practice Locations
2999 Regent St, Suite 714
Berkeley, CA 947052146
Phone: 5108483143
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2975 TREAT BLVD BLDG D, CONCORD, CA 945183601 (Tel: 9257885710)
Dentist (license number reported to NPPES: CA 23247)
NPI status registered as active in NPPES database
Registered at 2999 REGENT ST, SUITE 714, BERKELEY, CA 947052146 (Tel: 5108483143)
Registered at 2141 DENA DR, CONCORD, CA 945192222 (Tel: 5108483143)
Recorded as WILLIAM GIANNI, DDS
Dentist (license number reported to NPPES: CA 23247)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentists in Concord
- Dr. Nicole Hoang, DMD
- Dr. Jocett Villanueva, DMD
- Dr. Shadi Ryad, DDS
- Dr. Lester Yamashita, DDS
- Dr. Lyla Turkzadeh, DMD
- Dr. Rosalyn Burke, DDS
Mailing Address
2141 Dena Dr
Concord, CA 945192222
Phone: 5108483143