2026 NPPES data Obstetrics & Gynecology Physician NPI 1720046204 MD
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FRED DIEGMANN, MD

Obstetrics & Gynecology Physician in FAIRHOPE, Alabama. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
443
Medicare Part D claims · 132 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

FRED DIEGMANN, MD filed 443 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in FAIRHOPE, Alabama, prescribing 90% generic.

443
Part D claims, 2023
90%
generic prescribing

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

FRED DIEGMANN, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

443 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

FRED DIEGMANN, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about FRED DIEGMANN, MD?

Quality data not reported

NPI registry status

Active

Issued 05/03/2006

NPI 1720046204

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

443 147% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Alabama

How Obstetrics & Gynecology Physician compares to other specialties among Alabama providers

Alabama providers

Obstetrics & Gynecology Physician share within Alabama

1. Obstetrics & Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Physician share within Alabama

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Obstetrics & Gynecology Physician ABMS/AOA estimate

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

FRED DIEGMANN, MD is a Obstetrics & Gynecology Physician provider practicing in FAIRHOPE, Alabama, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1720046204. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

FRED DIEGMANN, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 150 S INGLESIDE ST, FAIRHOPE, AL, 36532, with a listed phone of (251) 990-6550. NPI 1720046204 was issued on 05/03/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DIEGMANN most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 443 prescription claims written by this provider, covering 132 Medicare beneficiaries and totaling roughly $37K in drug spend, split 10% brand-name and 90% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

150 S INGLESIDE ST
FAIRHOPE, AL 36532

Provider Details

NPI 1720046204
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Male
NPI Issued 05/03/2006

Brand vs generic prescribing mix · Typical

FRED DIEGMANN, MD — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 443 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

443
Total Claims
$37K
Total Drug Cost
132
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,068
Total Day Supply
31,158
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$15K
Generic Drug Cost
$21K
Antibiotic Claims
20

Patient Demographics

Average Patient Age
67.8 years
Avg HCC Risk Score
0.91
Age Distribution
<65: 31, 65-74: 68, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Estradiol
250
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
14
Yuvafem
Estradiol
14
Solifenacin Succinate
11
Premarin
"Estrogens
N/A
Progesterone
"Progesterone
N/A

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Obstetrics & Gynecology Physician Overview

How FRED DIEGMANN, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

FRED DIEGMANN, MD's 443 claims are above the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Alabama

Other clinicians with the same primary specialty enrolled in Alabama, drawn from the same CMS NPPES roster as DIEGMANN.

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is FRED DIEGMANN, MD's specialty?
FRED DIEGMANN, MD specializes in Obstetrics & Gynecology Physician and practices in FAIRHOPE, Alabama. Credentials: MD.
How much does FRED DIEGMANN, MD prescribe under Medicare Part D?
In 2023, FRED DIEGMANN, MD wrote 443 Medicare Part D claims totaling $37K in drug costs for 132 beneficiaries.
Where is FRED DIEGMANN, MD located?
FRED DIEGMANN, MD is located at 150 S INGLESIDE ST, FAIRHOPE, AL, 36532. Phone: (251) 990-6550.
What is FRED DIEGMANN, MD's NPI number?
FRED DIEGMANN, MD's National Provider Identifier (NPI) is 1720046204, issued on 05/03/2006.
Does FRED DIEGMANN, MD prescribe more brand-name or generic drugs?
FRED DIEGMANN, MD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $15K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does FRED DIEGMANN, MD prescribe most often?
Based on 2023 Medicare Part D data, FRED DIEGMANN, MD's most frequently prescribed drugs include Estradiol, Nitrofurantoin Mono-Macro, Yuvafem. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does FRED DIEGMANN, MD accept Medicare?
FRED DIEGMANN, MD appears in CMS Medicare data with 443 Part D claims and 132 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify FRED DIEGMANN, MD's credentials?
FRED DIEGMANN, MD's NPI is 1720046204 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology