What are the limitations of the vitamin d status interpretation?

While the vitamin d status interpretation is highly validated, it should not replace clinical judgment. OpiCalc provides the latest evidence-based limitations for the vitamin d status interpretation to ensure safe bedside use and optimal diagnostic accuracy.

How does the vitamin d status interpretation compare to other Endocrinology scores?

The vitamin d status interpretation is a gold-standard diagnostic tool. OpiCalc provides side-by-side clinical guidance to help clinicians choose the most specific evidence-based tool for their patient's presentation.

Is the vitamin d status interpretation free to use?

Yes. OpiCalc provides the vitamin d status interpretation completely ad-free and optimized for mobile bedside use, ensuring you can calculate medical risk swiftly and without distraction.

Calculate Vitamin d status interpretation | CMS & Clinical Guidelines

CLINICAL REFERENCE

CLINICAL INSIGHT

When to Use

When to Screen

Evaluating metabolic bone disease (Osteoporosis, Osteomalacia).
Workup of secondary hyperparathyroidism.
Evaluating malabsorption syndromes (Celiac, Bariatric surgery).
Screening high-risk groups (Elderly, dark skin, minimal sun exposure).

CLINICAL INSIGHT

How it Works

Classification Thresholds (Endocrine Society)

Category	ng/mL	nmol/L
Deficiency	< 20	< 50
Insufficiency	20 – 29	50 – 74
Sufficiency (Optimal)	30 – 100	75 – 250
Toxicity	> 100	> 250

CLINICAL INSIGHT

Practical Pearls

25(OH) vs 1,25(OH)2

Always use 25-hydroxyvitamin D for status assessment. 1,25-dihydroxyvitamin D (the active form) levels often remain normal or even elevated in the setting of deficiency due to secondary hyperparathyroidism stimulating renal alpha-hydroxylase.

Treatment Principles

Goal: Serum 25(OH)D > 30 ng/mL.
Loading: 50,000 IU vitamin D2 or D3 weekly for 8 weeks (or 6,000 IU daily).
Maintenance: 1,500–2,000 IU daily thereafter.

CLINICAL INSIGHT

Evidence Base

Primary Source

Evaluation, treatment, and prevention of vitamin D deficiency: an Endocrine Society clinical practice guideline.

Holick MF, et al.J Clin Endocrinol Metab2011

When to Use

When to Screen

How it Works

Classification Thresholds (Endocrine Society)

Practical Pearls

25(OH) vs 1,25(OH)2

Treatment Principles

Evidence Base

Primary Source

Vitamin D Status Interpretation

When to Use

When to Screen

How it Works

Classification Thresholds (Endocrine Society)

Practical Pearls

25(OH) vs 1,25(OH)2

Treatment Principles

Evidence Base

Primary Source

Vitamin D Status Interpretation

Clinical Evidence and Methodology

When to Use

When to Screen

How it Works

Classification Thresholds (Endocrine Society)

Practical Pearls

25(OH) vs 1,25(OH)2

Treatment Principles

Evidence Base

Primary Source

Vitamin D Status Interpretation

Clinical Evidence and Methodology

When to Use

When to Screen

How it Works

Classification Thresholds (Endocrine Society)

Practical Pearls

25(OH) vs 1,25(OH)2

Treatment Principles

Evidence Base

Primary Source

Vitamin D Status Interpretation